2018 United States state legislative elections

For related races, see 2018 United States elections.

The 2018 United States state legislative elections were held on November 6, 2018, for 87 state legislative chambers in 46 states. Across the fifty states, approximately 56 percent of all upper house seats and 92 percent of all lower house seats were up for election. Additionally, six territorial chambers in four territories and the District of Columbia were up as well.

2018 United States state legislative elections

← 2017 November 6, 2018 2019 →
87 legislative chambers 46 states
Majority party Minority party Third party   Party Republican Democratic Coalition Chambers before 67 30 1[a][b] Chambers after 61 37 1[a] Overall change 6 7[c]
Map of upper house elections:      Democrats gained control      Democrats retained control      Republicans retained control      Non-partisan legislature      No regularly-scheduled elections
Map of lower house elections:      Democrats gained control      Democrats retained control      Republicans retained control      Coalition retained control      Non-partisan legislature      No regularly-scheduled elections

Democrats made significant ground in state legislative races, flipping six chambers from the Republicans and winning control of one tied chamber.

Summary table

Regularly scheduled elections were held in 87 of the 99 state legislative chambers in the United States; nationwide, regularly scheduled elections were held for 6,064 of the 7,383 legislative seats. Most legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber.^[2] The chambers that were not up for election either hold regularly scheduled elections in odd-numbered years, or have four-year terms and hold all regularly scheduled elections in presidential election years.

Note that this table only covers regularly scheduled elections; additional special elections took place concurrently with these regularly scheduled elections.

State	Upper House[2]				Lower House[2]
	Seats up	Total	% up	Term	Seats up	Total	% up	Term
Alabama	35	35	100	4	105	105	100	4
Alaska	10	20	50	4	40	40	100	2
Arizona	30	30	100	2	60	60	100	2
Arkansas	18	35	51	2/4[d]	100	100	100	2
California	20	40	50	4	80	80	100	2
Colorado	17	35	49	4	65	65	100	2
Connecticut	36	36	100	2	151	151	100	2
Delaware	10	21	48	2/4[d]	41	41	100	2
Florida	20	40	50	2/4[d]	120	120	100	2
Georgia	56	56	100	2	180	180	100	2
Hawaii	12	25	48	2/4[d]	51	51	100	2
Idaho	35	35	100	2	70	70	100	2
Illinois	39	59	66	2/4[d]	118	118	100	2
Indiana	25	50	50	4	100	100	100	2
Iowa	25	50	50	4	100	100	100	2
Kansas	0	40	0	4	125	125	100	2
Kentucky	19	38	50	4	100	100	100	2
Louisiana	0	39	0	4	0	105	0	4
Maine	35	35	100	2	151	151	100	2
Maryland	47	47	100	4	141	141	100	4
Massachusetts	40	40	100	2	160	160	100	2
Michigan	38	38	100	4	110	110	100	2
Minnesota	0	67	0	2/4[d]	134	134	100	2
Mississippi	0	52	0	4	0	122	0	4
Missouri	17	34	50	4	163	163	100	2
Montana	25	50	50	4	100	100	100	2
Nebraska	24[e]	49[e]	49[e]	4	N/A (unicameral)
Nevada	11	21	52	4	42	42	100	2
New Hampshire	24	24	100	2	400	400	100	2
New Jersey	0	40	0	2/4[d]	0	80	0	2
New Mexico	0	42	100	4	70	70	100	2
New York	63	63	100	2	150	150	100	2
North Carolina	50	50	100	2	120	120	100	2
North Dakota	24	47	51	4	47	94	50	4
Ohio	16	33	52	4	99	99	100	2
Oklahoma	24	48	50	4	101	101	100	2
Oregon	15	30	50	4	60	60	100	2
Pennsylvania	25	50	50	4	203	203	100	2
Rhode Island	38	38	100	2	75	75	100	2
South Carolina	0	46	0	4	124	124	100	2
South Dakota	35	35	100	2	70	70	100	2
Tennessee	17	33	52	4	99	99	100	2
Texas	15	31	48	2/4[d]	150	150	100	2
Utah	14	29	48	4	75	75	100	2
Vermont	30	30	100	2	150	150	100	2
Virginia	0	40	0	4	0	100	0	2
Washington	25	49	49	4	98	98	100	2
West Virginia	17	34	50	4	100	100	100	2
Wisconsin	17	33	52	4	99	99	100	2
Wyoming	15	30	50	4	60	60	100	2
Total	1106	1972	56	N/A	4958	5411	92	N/A

Electoral predictions

News sources predicted Democrats would make significant gains in state legislative control, flipping multiple chambers and narrowing Republican majorities in many others.^[3]

Ratings are designated as follows:

• "Tossup": Competitive, no advantage
• "Lean": Competitive, slight advantage
• "Likely": Not competitive, but opposition could make significant gains
• "Safe": Not competitive at all

State	PVI	Chamber	Last election	Governing Oct. 8, 2018[3]	Daily Kos Oct. 11, 2018[4]	Result
Alabama	R+14	Senate	R 27–8	Safe R	Safe R	R 27–8
		House of Representatives	R 72–33	Safe R	Safe R	R 77–28
Alaska	R+9	Senate	R 14–6	Safe R	Safe R	R 13–7
		House of Representatives	Coal. 22–18	Tossup	Lean Coal.	Coal. 23–15–2
Arizona	R+5	Senate	R 17–13	Lean R	Tossup	R 17–13
		House of Representatives	R 35–25	Likely R	Lean R	R 31–29
Arkansas	R+15	Senate	R 26–9	Safe R	Safe R	R 26–9
		House of Representatives	R 73–27	Safe R	Safe R	R 76–24
California	D+12	State Senate	D 27–13	Safe D	Safe D	D 29–11
		State Assembly	D 55–25	Safe D	Safe D	D 61–18–1
Colorado	D+1	Senate	R 18–17	Tossup	Lean D (flip)	D 19–16
		House of Representatives	D 37–28	Likely D	Safe D	D 41–24
Connecticut	D+6	State Senate	18–18	Tossup	Tossup	D 22–14
		House of Representatives	D 80–71	Lean D	Likely D	D 97–54
Delaware	D+6	Senate	D 11–10	Lean D	Lean D	D 12–9
		House of Representatives	D 25–16	Safe D	Safe D	D 26–15
Florida	R+2	Senate	R 25–15	Lean R	Lean R	R 23–17
		House of Representatives	R 79–41	Likely R	Safe R	R 73–47
Georgia	R+5	State Senate	R 38–18	Likely R	Safe R	R 35–21
		House of Representatives	R 118–62	Likely R	Safe R	R 105–75
Hawaii	D+18	Senate	D 25–0	Safe D	Safe D	D 24–1
		House of Representatives	D 45–6	Safe D	Safe D	D 46–5
Idaho	R+19	Senate	R 29–6	Safe R	Safe R	R 28–7
		House of Representatives	R 59–11	Safe R	Safe R	R 56–14
Illinois	D+7	Senate	D 37–22	Safe D	Safe D	D 40–19
		House of Representatives	D 67–51	Safe D	Safe D	D 74–44
Indiana	R+9	Senate	R 41–9	Safe R	Safe R	R 40–10
		House of Representatives	R 70–30	Likely R	Safe R	R 67–33
Iowa	R+3	Senate	R 29–20–1	Safe R	Likely R	R 32–18
		House of Representatives	R 59–41	Lean R	Tossup	R 53–47
Kansas	R+13	House of Representatives	R 85–40	Safe R	Safe R	R 84–41
Kentucky	R+15	Senate	R 27–11	Safe R	Safe R	R 28–10
		House of Representatives	R 64–36	Safe R	Safe R	R 61–39
Maine	D+3	Senate	R 18–17	Tossup	Likely D (flip)	D 21–14
		House of Representatives	D 77–72–2	Lean D	Likely D	D 89–56–6
Maryland	D+12	Senate	D 33–14	Safe D	Safe D	D 32–15
		House of Representatives	D 92–49	Safe D	Safe D	D 99–42
Massachusetts	D+12	Senate	D 34–6	Safe D	Safe D	D 34–6
		House of Representatives	D 125–35	Safe D	Safe D	D 127–32–1
Michigan	D+1	Senate	R 27–11	Likely R	Safe R	R 22–16
		House of Representatives	R 63–47	Lean R	Lean R	R 58–52
Minnesota	D+1	House of Representatives	R 77–57	Lean R	Tossup	D 75–59
Missouri	R+9	Senate	R 25–9	Likely R	Safe R	R 23–10
		House of Representatives	R 117–46	Likely R	Safe R	R 116–47
Montana	R+11	Senate	R 32–18	Safe R	Safe R	R 30–20
		House of Representatives	R 59–41	Safe R	Safe R	R 58–42
Nevada	D+1	Senate	D 11–10	Likely D	Likely D	D 13–8
		Assembly	D 27–15	Likely D	Safe D	D 29–13
New Hampshire	D+1	Senate	R 14–10	Lean D (flip)	Lean R	D 14–10
		House of Representatives	R 227–173	Lean D (flip)	Lean D (flip)	D 234–166
New Mexico	D+3	House of Representatives	D 38–32	Safe D	Safe D	D 46–24
New York	D+11	State Senate	Coal. 39–24	Lean D (flip)	Likely D (flip)	D 40–23
		State Assembly	D 106–43–1	Safe D	Safe D	D 105–44–1
North Carolina	R+3	Senate	R 35–15	Likely R	Safe R	R 29–21
		House of Representatives	R 74–46	Likely R	Likely R	R 65–55
North Dakota	R+16	Senate	R 38–9	Safe R	Safe R	R 37–10
		House of Representatives	R 81–13	Safe R	Safe R	R 79–15
Ohio	R+3	Senate	R 24–9	Safe R	Safe R	R 24–9
		House of Representatives	R 66–33	Likely R	Safe R	R 61–38
Oklahoma	R+20	Senate	R 42–6	Safe R	Safe R	R 38–9
		House of Representatives	R 75–26	Likely R	Safe R	R 77–23
Oregon	D+5	State Senate	D 17–13	Safe D	Safe D	D 18–12
		House of Representatives	D 35–25	Safe D	Safe D	D 38–22
Pennsylvania	EVEN	State Senate	R 34–16	Likely R	Safe R	R 28–21–1
		House of Representatives	R 121–82	Likely R	Likely R	R 110–93
Rhode Island	D+10	Senate	D 33–5	Safe D	Safe D	D 33–5
		House of Representatives	D 64–10–1	Safe D	Safe D	D 66–9
South Carolina	R+8	House of Representatives	R 80–44	Safe R	Safe R	R 80–44
South Dakota	R+14	Senate	R 29–6	Safe R	Safe R	R 30–5
		House of Representatives	R 60–10	Safe R	Safe R	R 59–11
Tennessee	R+14	Senate	R 28–5	Safe R	Safe R	R 27–5
		House of Representatives	R 74–25	Safe R	Safe R	R 73–26
Texas	R+8	Senate	R 20–11	Safe R	Safe R	R 19–12
		House of Representatives	R 95–55	Likely R	Safe R	R 83–67
Utah	R+20	State Senate	R 24–5	Safe R	Safe R	R 23–6
		House of Representatives	R 62–13	Safe R	Safe R	R 59–16
Vermont	D+15	Senate	D 21–7–2	Safe D	Safe D	D 22–6–2
		House of Representatives	D 85–53–7–7	Safe D	Safe D	D 95–43–7–5
Washington	D+7	State Senate	D 26–23[f]	Likely D	Safe D	D 28–21
		House of Representatives	D 50–48	Likely D	Safe D	D 57–41
West Virginia	R+19	Senate	R 22–12	Likely R	Likely R	R 20–14
		House of Delegates	R 63–37	Safe R	Safe R	R 59–41
Wisconsin	EVEN	Senate	R 20–13	Tossup	Lean R	R 19–14
		State Assembly	R 64–35	Likely R	Safe R	R 63–34
Wyoming	R+25	Senate	R 27–3	Safe R	Safe R	R 27–3
		House of Representatives	R 52–8	Safe R	Safe R	R 50–9–1

National results

Lower house results by party[5] Party Seats before[g] Chambers before Seats after +/- Chambers after +/- Republican 3034 31 2792 242 29 2 Democratic 2348 17 2594 246 19 2 Independent 20 0 17 3 0 Progressive 7 0 7 0 Independence 1 0 1 0 Green 1 0 0 1 0 Total 5411 49 5411 — 49 —

Upper house results by party[h][5] Party Seats before[i] Chambers before Seats after +/- Chambers after +/- Republican 1153 36 1091 62 32 4 Democratic 811 13 877 66 18 5 Independent 5 0 2 3 0 Progressive 2 0 2 0 Libertarian 1 0 0 1 0 Total 1972 50 1972 — 50 —

Democrats flipped over 350 state legislative seats from the Republicans,^[6] with Republican flips offsetting their to total net gain to just over 300 seats. Democrats picked up most of those seats in states where President Trump's approval rating was relatively low.^[7] Six chambers—the Colorado Senate, New Hampshire House, New Hampshire Senate, Minnesota House, Maine Senate, and New York State Senate—flipped from Republican to Democratic control.^[8] Additionally the Connecticut Senate went from being evenly divided to a Democratic majority.^[8] Democrats also broke Republican legislative supermajorities in North Carolina,^[9] Michigan, and Pennsylvania,^[7] and they gained a legislative supermajority in both houses of the California, Illinois, and Oregon legislatures.^[10][11]

Maps

• 
  Partisan control of states in the 2018 elections
  

    Democrats retained trifecta

    Democrats gained trifecta

    Republicans retained trifecta

    Republicans gained trifecta

    Divided government maintained

    Divided government established

    Officially non-partisan legislature
• 
  Upper house seats by party holding majority in each state
  

  Republican   50–60%   60–70%   70–80%   80–90%   90–100%

  Democratic   50–60%   60–70%   70–80%   80–90%   90–100%

• 
  Lower house seats by party holding majority in each state
  

  Republican   50–60%   60–70%   70–80%   80–90%

  Democratic   50–60%   60–70%   70–80%   80–90%   90–100%

• 
  Net changes to upper house seats after the 2018 elections
       +1 Dem seat      +2 Dem seats      +3–5 Dem seats      +6–8 Dem seats
       +1 Rep seat      +3 Rep seats
• 
  Net changes to lower house seats after the 2018 elections
       +1 Dem seat      +2 Dem seats      +3–5 Dem seats      +6–61 Dem seats
       +1 Rep seat      +2 Rep seats      +5 Rep seats
       +1 Ind seat

State summaries

Alabama

Main articles: 2018 Alabama Senate election and 2018 Alabama House of Representatives election

2018 Alabama House of Representatives elections

All members of the Alabama Senate and the Alabama House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Alabama Senate

Party		Before	After	Change
	Republican	26	27	1
	Independent	1	0	1
	Democratic	8	8
Total		35	35

Alabama House of Representatives

Party		Before	After	Change
	Republican	72	77	5
	Democratic	33	28	5
Total		105	105

Alaska

Main articles: 2018 Alaska Senate election and 2018 Alaska House of Representatives election

2018 Alaska House of Representatives elections

Half of the seats of the Alaska Senate and all of the seats of the Alaska House of Representatives were up for election in 2018. Republicans retained control of the Senate, while a cross-partisan coalition of Democrats, Republicans, and independents retained control of the House of Representatives.^[12]

Alaska Senate

Party		Before	After	Change
	Republican	14	13	1
	Democratic	6	7	1
Total		20	20

Alaska House of Representatives

Party		Before	After	Change
	Democratic	17[j]	15[k]	2
	Independent	2	2
	Republican	3	8	2
		18	15
Total		40	40

Arizona

Main articles: 2018 Arizona Senate election and 2018 Arizona State House of Representatives election

2018 Arizona House of Representatives elections

All of the seats of the Arizona Senate and the Arizona House of Representatives were up for election in 2018. Republicans retained control of both chambers, but lost four seats in the House and lost the popular vote in the Senate by 1.4 points.

Arizona Senate

Party		Before	After	Change
	Republican	17	17
	Democratic	13	13
Total		30	30

Arizona House of Representatives

Party		Before	After	Change
	Republican	35	31	4
	Democratic	25	29	4
Total		60	60

Arkansas

Main articles: 2018 Arkansas Senate election and 2018 Arkansas House of Representatives election

2018 Arkansas House of Representatives elections

Half of the seats of the Arkansas Senate and all of the seats of the Arkansas House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Arkansas Senate

Party		Before	After	Change
	Republican	28	29	1
	Democratic	7	6	1
Total		35	35

Arkansas House of Representatives

Party		Before	After	Change
	Republican	77	82	5
	Democratic	23	18	5
Total		100	100

California

Main articles: 2018 California State Senate election and 2018 California State Assembly election

2018 California Assembly elections

Half of the seats of the California State Senate and all of the seats of the California State Assembly were up for election in 2018. Democrats retained control of both chambers.

California State Senate

Party		Before	After	Change
	Democratic	26	29	3
	Republican	14	11	3
Total		40	40

California State Assembly

Party		Before	After	Change
	Democratic	55	60	5
	Republican	25	20	5
Total		80	80

Colorado

Main articles: 2018 Colorado State Senate election and 2018 Colorado House of Representatives election

2018 Colorado House of Representatives elections

Half of the seats of the Colorado Senate and all of the seats of the Colorado House of Representatives were up for election in 2018. Democrats won control of the Senate and retained control of the House of Representatives.

Colorado Senate

Party		Before	After	Change
	Democratic	17	19	2
	Republican	18	16	2
Total		35	35

Colorado House of Representatives

Party		Before	After	Change
	Democratic	37	42	5
	Republican	28	23	5
Total		65	65

Connecticut

Main articles: 2018 Connecticut State Senate election and 2018 Connecticut House of Representatives election

2018 Connecticut House of Representatives elections

All of the seats of the Connecticut State Senate and the Connecticut House of Representatives were up for election in 2018. Democrats won control of the Senate, which was previously tied and retained control of the House of Representatives.

Connecticut State Senate

Party		Before	After	Change
	Democratic	18	23	5
	Republican	18	13	5
Total		36	36

Connecticut House of Representatives

Party		Before	After	Change
	Democratic	80	92	12
	Republican	71	59	12
Total		151	151

Delaware

Main articles: 2018 Delaware State Senate election and 2018 Delaware House of Representatives election

2018 Delaware House of Representatives elections

Half of the seats of the Delaware Senate and all of the seats of the Delaware House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Delaware Senate

Party		Before	After	Change
	Democratic	11	12	1
	Republican	10	9	1
Total		21	21

Delaware House of Representatives

Party		Before	After	Change
	Democratic	25	26	1
	Republican	16	15	1
Total		41	41

Florida

Main articles: 2018 Florida Senate election and 2018 Florida House of Representatives election

2018 Florida House of Representatives elections

Half of the seats of the Florida Senate and all of the seats of the Florida House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Florida Senate

Party		Before	After	Change
	Republican	24	23	1
	Democratic	16	17	1
Total		40	40

Florida House of Representatives

Party		Before	After	Change
	Republican	78	73	5
	Democratic	42	47	5
Total		120	120

Georgia

Main articles: 2018 Georgia State Senate election and 2018 Georgia House of Representatives election

2018 Georgia House of Representatives elections

All of the seats of the Georgia State Senate and the Georgia House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Georgia State Senate

Party		Before	After	Change
	Republican	37	35	2
	Democratic	19	21	2
Total		56	56

Georgia House of Representatives

Party		Before	After	Change
	Republican	116	105	11
	Democratic	64	75	11
Total		180	180

Hawaii

Main articles: 2018 Hawaii Senate election and 2018 Hawaii House of Representatives election

2018 Hawaii House of Representatives elections

Half of the seats of the Hawaii Senate and all of the seats of the Hawaii House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Hawaii Senate

Party		Before	After	Change
	Democratic	25	24	1
	Republican	0	1	1
Total		25	25

Hawaii House of Representatives

Party		Before	After	Change
	Democratic	46	46
	Republican	5	5
Total		51	51

Idaho

Main articles: 2018 Idaho House of Representatives election and 2018 Idaho Senate election

2018 Idaho House of Representatives elections

All of the seats of the Idaho Senate and the Idaho House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Idaho Senate

Party		Before	After	Change
	Republican	29	28	1
	Democratic	6	7	1
Total		35	35

Idaho House of Representatives

Party		Before	After	Change
	Republican	59	56	3
	Democratic	11	14	3
Total		70	70

Illinois

Main articles: 2018 Illinois Senate election and 2018 Illinois House of Representatives election

2018 Illinois House of Representatives elections

Two-thirds of the seats of the Illinois Senate and all of the seats of the Illinois House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Illinois Senate

Party		Before	After	Change
	Democratic	37	40	3
	Republican	22	19	3
Total		59	59

Illinois House of Representatives

Party		Before	After	Change
	Democratic	67	74	7
	Republican	51	44	7
Total		118	118

Indiana

Main articles: 2018 Indiana State Senate election and 2018 Indiana House of Representatives election

2018 Indiana House of Representatives elections

Half of the seats of the Indiana Senate and all of the seats of the Indiana House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Indiana Senate

Party		Before	After	Change
	Republican	41	40	1
	Democratic	9	10	1
Total		50	50

Indiana House of Representatives

Party		Before	After	Change
	Republican	70	67	3
	Democratic	30	33	3
Total		100	100

Iowa

Main articles: 2018 Iowa Senate election and 2018 Iowa House of Representatives election

2018 Iowa House of Representatives elections

Half of the seats of the Iowa Senate and all of the seats of the Iowa House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Iowa Senate

Party		Before	After	Change
	Republican	29	32	3
	Democratic	20	18	2
	Independent	1	0	1
Total		50	50

Iowa House of Representatives

Party		Before	After	Change
	Republican	59	53	6
	Democratic	41	47	6
Total		100	100

Kansas

Main article: 2018 Kansas House of Representatives election

2018 Kansas House of Representatives elections

All of the seats of the Kansas House of Representatives were up for election in 2018; the Republican-controlled Kansas Senate did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

Kansas House of Representatives

Party		Before	After	Change
	Republican	85	85
	Democratic	40	40
Total		125	125

Kentucky

Main articles: 2018 Kentucky Senate election and 2018 Kentucky House of Representatives election

2018 Kentucky House of Representatives elections

Half of the seats of the Kentucky Senate and all of the seats of the Kentucky House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Kentucky Senate

Party		Before	After	Change
	Republican	27	28	1
	Democratic	11	10	1
Total		38	38

Kentucky House of Representatives

Party		Before	After	Change
	Republican	63	61	2
	Democratic	37	39	2
Total		100	100

Maine

Main articles: 2018 Maine State Senate election and 2018 Maine House of Representatives election

2018 Maine House of Representatives elections

All of the seats of the Maine Senate and the Maine House of Representatives were up for election in 2018. Democrats gained control of the state senate and retained control of the House of Representatives.

Maine Senate

Party		Before	After	Change
	Democratic	17	21	4
	Republican	18	14	4
Total		35	35

Maine House of Representatives

Party		Before	After	Change
	Democratic	73	89	16
	Republican	70	57	13
	Independent	7	5	2
	Green	1	0	1
Total		151	151

Maryland

Main articles: 2018 Maryland Senate election and 2018 Maryland House of Delegates election

2018 Maryland House of Delegates elections

All of the seats of the Maryland Senate and the Maryland House of Delegates were up for election in 2018. Democrats retained control of both chambers.

Maryland Senate

Party		Before	After	Change
	Democratic	33	32	1
	Republican	14	15	1
Total		47	47

Maryland House of Delegates

Party		Before	After	Change
	Democratic	92	99	7
	Republican	49	42	7
Total		141	141

Massachusetts

Main articles: 2018 Massachusetts Senate election and 2018 Massachusetts House of Representatives election

2018 Massachusetts House of Representatives elections

All of the seats of the Massachusetts Senate and the Massachusetts House of Representatives were up for election in 2018. Democrats control both chambers, and the governor is a member of the Republican Party. Democrats hold a veto-proof supermajority in the state legislature.^[13]

Massachusetts Senate

Party		Before	After	Change
	Democratic	33	34	1
	Republican	7	6	1
Total		40	40

Massachusetts House of Representatives

Party		Before	After	Change
	Democratic	125	127	2
	Republican	34	32	2
	Independent	1	1
Total		160	160

Michigan

Main articles: 2018 Michigan Senate election and 2018 Michigan House of Representatives election

2018 Michigan House of Representatives elections

All of the seats of the Michigan Senate and the Michigan House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.^[7]

Michigan Senate

Party		Before	After	Change
	Republican	27	22	5
	Democratic	11	16	5
Total		110	110

Michigan House of Representatives

Party		Before	After	Change
	Republican	63	58	5
	Democratic	47	52	5
Total		110	110

Minnesota

Main article: 2018 Minnesota House of Representatives election

2018 Minnesota House of Representatives elections

All of the seats of the Minnesota House of Representatives were up for election in 2018; the Republican-controlled Minnesota Senate did not hold regularly scheduled elections in 2018. Democrats won control of the House of Representatives, making Minnesota the only state in the country where each major party controlled one state legislative chamber.^[6]

Minnesota House of Representatives

Party		Before	After	Change
	Democratic (DFL)	57	75	18
	Republican	77	59	18
Total		134	134

Missouri

Main articles: 2018 Missouri Senate election and 2018 Missouri House of Representatives election

2018 Missouri House of Representatives elections

Half of the seats of the Missouri Senate and all of the seats of the Missouri House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Missouri Senate

Party		Before	After	Change
	Republican	24	24
	Democratic	10	10
Total		34	34

Missouri House of Representatives

Party		Before	After	Change
	Republican	117	116	1
	Democratic	46	47	1
Total		163	163

Montana

Main articles: 2018 Montana House of Representatives election and 2018 Montana Senate election

2018 Montana House of Representatives elections

Half of the seats of the Montana Senate and all of the seats of the Montana House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Montana Senate

Party		Before	After	Change
	Republican	32	30	2
	Democratic	18	20	2
Total		50	50

Montana House of Representatives

Party		Before	After	Change
	Republican	59	58	1
	Democratic	41	42	1
Total		100	100

Nebraska

Main article: 2018 Nebraska State Legislature election

Nebraska is the only U.S. state with a unicameral legislature; half of the seats of the Nebraska Legislature were up for election in 2018. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates. Republicans maintained control.

Nebraska Legislature

Party		Before	After	Change
	Republican	31	30	1
	Democratic	16	18	2
	Independent	1	1
	Libertarian	1	0	1
Total		49	49

Nevada

Main articles: 2018 Nevada State Senate election and 2018 Nevada House of Representatives election

2018 Nevada Assembly elections

Half of the seats of the Nevada Senate and all of the seats of the Nevada Assembly were up for election in 2018. Democrats retained control of both chambers.

Nevada Senate

Party		Before	After	Change
	Democratic	11	13	2
	Independent	1	0	1
	Republican	9	8	1
Total		21	21

Nevada Assembly

Party		Before	After	Change
	Democratic	27	29	2
	Republican	15	13	2
Total		42	42

New Hampshire

Main articles: 2018 New Hampshire Senate election and 2018 New Hampshire House of Representatives election

2018 New Hampshire House of Representatives elections

All of the seats of the New Hampshire Senate and the New Hampshire House of Representatives were up for election in 2018. Democrats won control of both chambers.

New Hampshire Senate

Party		Before	After	Change
	Democratic	10	14	4
	Republican	14	10	4
Total		24	24

New Hampshire House of Representatives

Party		Before	After	Change
	Democratic	173	234	61
	Republican	227	166	61
Total		400	400

New Mexico

Main article: 2018 New Mexico House of Representatives election

2018 New Mexico House of Representatives elections

All of the seats of the New Mexico House of Representatives were up for election in 2018; the Democratic-controlled New Mexico Senate did not hold regularly scheduled elections in 2018. Democrats retained control of the House of Representatives.

New Mexico House of Representatives

Party		Before	After	Change
	Democratic	39	46	7
	Republican	31	24	7
Total		70	70

New York

Main articles: 2018 New York State Senate election and 2018 New York State Assembly election

2018 New York State Assembly elections

All of the seats of the New York State Senate and the New York State Assembly were up for election in 2018. Democrats won control of the state senate and retained control of the state assembly.

New York State Senate

Party		Before	After	Change
	Democratic	31	39	8
		1[l]	1
	Republican	31	23	8
Total		63	63

New York State Assembly

Party		Before	After	Change
	Democratic	107	106	1
	Republican	42	43	1
	Independence	1	1
Total		150	150

North Carolina

Main articles: 2018 North Carolina Senate election and 2018 North Carolina House of Representatives election

2018 North Carolina House of Representatives elections

All of the seats of the North Carolina Senate and the North Carolina House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats won enough seats to break the Republican legislative super-majority.^[9]

North Carolina Senate

Party		Before	After	Change
	Republican	35	29	6
	Democratic	15	21	6
Total		50	50

North Carolina House of Representatives

Party		Before	After	Change
	Republican	75	65	10
	Democratic	45	55	10
Total		120	120

North Dakota

Main articles: 2018 North Dakota Senate election and 2018 North Dakota House of Representatives election

2018 North Dakota House of Representatives elections

Half of the seats of the North Dakota Senate and the North Dakota House of Representatives were up for election in 2018. Republicans retained control of both chambers.

North Dakota Senate

Party		Before	After	Change
	Republican	38	37	1
	Democratic-NPL	9	10	1
Total		47	47

North Dakota House of Representatives

Party		Before	After	Change
	Republican	81	79	2
	Democratic-NPL	13	15	2
Total		94	94

Ohio

Main articles: 2018 Ohio Senate election and 2018 Ohio House of Representatives election

2018 Ohio House of Representatives elections

Half of the seats of the Ohio Senate and all of the seats of the Ohio House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Ohio Senate

Party		Before	After	Change
	Republican	24	24
	Democratic	9	9
Total		33	33

Ohio House of Representatives

Party		Before	After	Change
	Republican	66	61	5
	Democratic	33	38	5
Total		99	99

Oklahoma

Main articles: 2018 Oklahoma Senate election and 2018 Oklahoma House of Representatives election

2018 Oklahoma House of Representatives elections

Half of the seats of the Oklahoma Senate and all of the seats of the Oklahoma House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Oklahoma Senate

Party		Before	After	Change
	Republican	42	39	3
	Democratic	6	9	3
Total		48	48

Oklahoma House of Representatives

Party		Before	After	Change
	Republican	75	77	2
	Democratic	26	24	2
Total		101	101

Oregon

Main article: 2018 Oregon legislative election

2018 Oregon House of Representatives elections

Half of the seats of the Oregon State Senate and all of the seats of the Oregon House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Oregon State Senate

Party		Before	After	Change
	Democratic	17	18	1
	Republican	13	12	1
Total		30	30

Oregon House of Representatives

Party		Before	After	Change
	Democratic	35	38	3
	Republican	25	22	3
Total		50	50

Pennsylvania

Main articles: 2018 Pennsylvania Senate election and 2018 Pennsylvania House of Representatives election

2018 Pennsylvania upper house elections

2018 Pennsylvania House of Representatives elections

Half of the seats of the Pennsylvania State Senate and all of the seats of the Pennsylvania House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.^[7]

Pennsylvania State Senate

Party		Before	After	Change
	Republican	34	29	5
	Democratic	16	21	5
Total		50	50

Pennsylvania House of Representatives

Party		Before	After	Change
	Republican	121	110	11
	Democratic	82	93	11
Total		203	203

Rhode Island

Main articles: 2018 Rhode Island Senate election and 2018 Rhode Island House of Representatives election

2018 Rhode Island House of Representatives elections

All of the seats of the Rhode Island Senate and the Rhode Island House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Rhode Island Senate

Party		Before	After	Change
	Democratic	33	33
	Republican	5	5
Total		38	38

Rhode Island House of Representatives

Party		Before	After	Change
	Democratic	64	66	2
	Republican	11	9	2
Total		75	75

South Carolina

Main article: 2018 South Carolina House of Representatives election

2018 South Carolina House of Representatives elections

All of the seats of the South Carolina House of Representatives were up for election in 2018; the Republican-controlled South Carolina Senate did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

South Carolina House of Representatives

Party		Before	After	Change
	Republican	80	80
	Democratic	44	44
Total		124	124

South Dakota

Main articles: 2018 South Dakota Senate election and 2018 South Dakota House of Representatives election

2018 South Dakota House of Representatives elections

All of the seats of the South Dakota Senate and the South Dakota House of Representatives were up for election in 2018. Republicans retained control of both chambers.

South Dakota Senate

Party		Before	After	Change
	Republican	29	30	1
	Democratic	6	5	1
Total		35	35

South Dakota House of Representatives

Party		Before	After	Change
	Republican	60	59	1
	Democratic	10	11	1
Total		70	70

Tennessee

Main articles: 2018 Tennessee State Senate election and 2018 Tennessee House of Representatives election

2018 Tennessee House of Representatives elections

Half of the seats of the Tennessee Senate and all of the seats of the Tennessee House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Tennessee Senate

Party		Before	After	Change
	Republican	28	28
	Democratic	5	5
Total		33	33

Tennessee House of Representatives

Party		Before	After	Change
	Republican	74	73	1
	Democratic	25	26	1
Total		99	99

Texas

Main articles: 2018 Texas Senate election and 2018 Texas House of Representatives election

2018 Texas House of Representatives elections

Half of the seats of the Texas Senate and all of the seats of the Texas House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Texas Senate

Party		Before	After	Change
	Republican	21	19	2
	Democratic	10	12	2
Total		31	31

Texas House of Representatives

Party		Before	After	Change
	Republican	95	83	12
	Democratic	55	67	12
Total		150	150

Utah

Main articles: 2018 Utah Senate election and 2018 Utah House of Representatives election

2018 Utah House of Representatives elections

Half of the seats of the Utah State Senate and all of the seats of the Utah House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Utah State Senate

Party		Before	After	Change
	Republican	24	23	1
	Democratic	5	6	1
Total		29	29

Utah House of Representatives

Party		Before	After	Change
	Republican	62	59	3
	Democratic	13	16	3
Total		75	75

Vermont

Main articles: 2018 Vermont Senate election and 2018 Vermont House of Representatives election

2018 Vermont House of Representatives elections

All of the seats of the Vermont Senate and the Vermont House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Vermont Senate

Party		Before	After	Change
	Democratic	21	22	1
	Republican	7	6	1
	Progressive	2	2
Total		30	30

Vermont House of Representatives

Party		Before	After	Change
	Democratic	83	95	12
	Republican	53	43	10
	Progressive	7	7
	Independent	7	5	2
Total		150	150

Washington

Main articles: 2018 Washington State Senate election and 2018 Washington House of Representatives election

2018 Washington House of Representatives elections

Half of the seats of the Washington State Senate and all of the seats of the Washington House of Representatives were up for election in 2018. Democrats had previously flipped control of the Senate in a 2017 special election.^[14] Democrats retained control of both chambers.

Washington State Senate

Party		Before	After	Change
	Democratic	25	28	3
		1[m]	1[m]	3
	Republican	23	20
Total		49	49

Washington House of Representatives

Party		Before	After	Change
	Democratic	50	57	7
	Republican	48	41	7
Total		98	98

West Virginia

Main articles: 2018 West Virginia Senate election and 2018 West Virginia House of Delegates election

2018 West Virginia House of Delegates elections

Half of the seats of the West Virginia Senate and all of the seats of the West Virginia House of Delegates were up for election in 2018. Republicans retained control of both chambers.

West Virginia Senate

Party		Before	After	Change
	Republican	22	20	2
	Democratic	12	14	2
Total		34	34

West Virginia House of Delegates

Party		Before	After	Change
	Republican	64	57	7
	Democratic	36	43	7
Total		100	100

Wisconsin

Main articles: 2018 Wisconsin State Senate election and 2018 Wisconsin State Assembly election

2018 Wisconsin State Assembly elections

Half of the seats of the Wisconsin State Senate and all of the seats of the Wisconsin State Assembly were up for election in 2018. Republicans retained control of both chambers.

Wisconsin Senate

Party		Before	After	Change
	Republican	18	19	1
	Democratic	15	14	1
Total		33	33

Wisconsin State Assembly

Party		Before	After	Change
	Republican	64	63	1
	Democratic	35	36	1
Total		99	99

Wyoming

Main articles: 2018 Wyoming Senate election and 2018 Wyoming House of Representatives election

2018 Wyoming House of Representatives elections

Half of the seats of the Wyoming Senate and all of the seats of the Wyoming House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Wyoming Senate

Party		Before	After	Change
	Republican	27	27
	Democratic	3	3
Total		30	30

Wyoming House of Representatives

Party		Before	After	Change
	Republican	51	50	1
	Democratic	9	9
	Independent	0	1	1
Total		60	60

Territorial and federal district summaries

American Samoa

All of the seats of the American Samoa House of Representatives were up for election. Members of the House of Representatives serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.

Guam

All of the seats of the unicameral Legislature of Guam were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Guam Legislature

Party		Before	After	Change
	Democratic	9	10	1
	Republican	6	5	1
Total		15	15

Northern Mariana Islands

A portion of the seats of the Northern Mariana Islands Senate, and all of the seats of the Northern Mariana Islands House of Representatives, were up for election. Members of the senate serve either four-year terms, while members of the house serve two-year terms. Republicans maintained control of both chambers.

Northern Mariana Islands Senate^[15]

Party		Before	After	Change
	Republican	7	6	1
	Independent	2	3	1
	Democratic	0	0
Total		9	9

Northern Mariana Islands House of Representatives^[16]

Party		Before	After	Change
	Republican	15	13	2
	Democratic	0	0
	Independent	5	7	2
Total		20	20

U.S. Virgin Islands

All of the seats of the unicameral Legislature of the Virgin Islands were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Virgin Islands Legislature

Party		Before	After	Change
	Democratic	11	13	2
	Independent	4	2	2
Total		15	15

Washington, D.C.

Council results

The Council of the District of Columbia serves as the legislative branch of the federal district of Washington, D.C. Half of the council seats are up for election. Council members serve four-year terms. Democrats retained supermajority control of the council.

District of Columbia Council

Party		Before	After	Change
	Democratic	11	11
	Independent	2	2
Total		13	13

Special elections

Various states will hold special elections for legislative districts throughout the year.^[17]

Alabama

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	21	Jim Patterson	Republican	2010	Incumbent died October 2, 2017, of heart attack. New member elected March 27, 2018. Republican hold.	▌ Y Rex Reynolds (Republican) 52.8% ▌ C. Terry Jones (Democratic) 47.1%
House	4	Micky Hammon	Republican	2002	Incumbent resigned September 11, 2017. New member elected May 15, 2018. Republican hold.	▌ Y Parker Moore (Republican) 65.0% Jo Ann Cummings (Democratic) 25.4% Pete Wills (Independent) 9.5%
Senate	26	Quinton T. Ross, Jr.	Democratic	2002	Incumbent resigned October 2, 2017, to become the president of Alabama State University New member elected May 15, 2018. Democratic hold.	▌ Y David Burkette (Democratic) 89.3% ▌ D.J. Johnson(Republican) 10.4%

New Jersey

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates[18][19]
Senate	38	Robert M. Gordon	Democratic	2007	Incumbent resigned April 4, 2018, to join the New Jersey Board of Public Utilities.[20] New member elected November 6, 2018. Democratic hold.	▌ Y Joseph Lagana (Democratic) 60.1% ▌ Daisy Ortiz Berger (Republican) 39.9%
Assembly	5	Arthur Barclay	Democratic	2015	Incumbent resigned June 18, 2018, following arrest for assault.[21] New member elected November 6, 2018. Democratic hold.	▌ Y William Spearman (Democratic) 66.3% ▌ Nicholas Kush (Republican) 33.7%
Assembly	15	Elizabeth Maher Muoio	Democratic	2015 (appointed)	Incumbent resigned January 15, 2018, to become State Treasurer of New Jersey.[22] New member elected November 6, 2018. Democratic hold.	▌ Y Verlina Reynolds-Jackson (Democratic) 72.0% ▌ Tracy R. Sinatra (Republican) 26.4% ▌ Ed Forchion (Repeal Bail Reform) 1.6%
Assembly	15	Reed Gusciora	Democratic	1995	Incumbent resigned June 30, 2018, to become Mayor of Trenton.[23] New member elected November 6, 2018. Democratic hold.	▌ Y Anthony Verrelli (Democratic) 71.5% ▌ Justin Tibbetts (Republican) 25.5% ▌ Alex Bethea (Integrity Transparency Accountability) 3.0%
Assembly	22	Jerry Green	Democratic	1991	Incumbent died April 18, 2018, from a long illness.[24] New member elected November 6, 2018. Democratic hold.	▌ Y Linda S. Carter (Democratic) 69.4% ▌ John Quattrocchi (Republican) 30.6%
Assembly	32	Vincent Prieto	Democratic	2004 (appointed)	Incumbent resigned February 26, 2018, to become President and CEO of the New Jersey Sports and Exposition Authority.[25] New member elected November 6, 2018. Democratic hold.	▌ Y Pedro Mejia (Democratic) 100.0%
Assembly	34	Sheila Oliver	Democratic	2003	Incumbent resigned January 9, 2018, to become Lieutenant Governor of New Jersey.[26] New member elected November 6, 2018. Democratic hold.	▌ Y Britnee Timberlake (Democratic) 81.9% ▌ Irene DeVita (Republican) 16.6% ▌ Clenard Howard Childress Jr. (Stop the Insanity) 1.5%
Assembly	36	Marlene Caride	Democratic	2011	Incumbent resigned January 16, 2018, to become Commissioner of the New Jersey Department of Banking and Insurance.[27] New member elected November 6, 2018. Democratic hold.	▌ Y Clinton Calabrese (Democratic) 63.8% ▌ Marc Marsi (Republican) 36.2%
Assembly	38	Joseph Lagana	Democratic	2013	Incumbent resigned April 12, 2018, to join the State Senate.[28] New member elected November 6, 2018. Democratic hold.	▌ Y Lisa Swain (Democratic) 59.7% ▌ Gail Horton (Republican) 40.3%
Assembly	38	Tim Eustace	Democratic	2011	Incumbent resigned April 13, 2018, to become Deputy Director of the North Jersey District Water Supply Commission.[29] New member elected November 6, 2018. Democratic hold.	▌ Y Chris Tully (Democratic) 59.3% ▌ Jayme Ouellette (Republican) 40.7%

Notes

1. The Alaska House of Representatives is controlled by a coalition of Democrats, Republicans, and independents. The minority caucus consists of Republicans who are not part of the majority coalition.
2. On April 16, 2018, the Independent Democratic Conference, which had been in coalition with Republicans since 2012, dissolved, returning the chamber to Republican control.^[1]
3. The Connecticut Senate was tied in the 2017-2019 session, but Democrats gained control in the 2018 elections. This chamber was not included in the previous total.
4. The upper houses of Arkansas, Delaware, Florida, Hawaii, Illinois, Minnesota, New Jersey, and Texas use a 2-4-4 term length system.
5. These figures represent the seats of Nebraska's unicameral legislature.
6. Includes a 2017 special election that flipped a seat to Democrats, winning them control of the chamber from the Majority Coalition Caucus
7. Counts seats that were vacant prior to the election towards the party that last held them
8. Counts seats in the officially nonpartisan Nebraska legislature towards the party that endorsed each candidate
9. Counts seats that were vacant prior to the election towards the party that last held them
10. Coalition consisted of 17 Democrats, 3 Republicans, and 2 Independents.
11. Coalition consisted of 15 Democrats, 8 Republicans, and 2 Independents.
12. Democrat Simcha Felder caucused with the Republicans until after the elections.
13. One Democrat caucused with the Republicans