Kentucky's 4th Senate district

Kentucky's 4th Senatorial district is one of 38 districts in the Kentucky Senate. Located in western Kentucky, it comprises the counties of Henderson, Hopkins, Union, and Webster. It has been represented by Robby Mills (R–Henderson) since 2019.^[1] As of 2023, the district had a population of 115,888.^[2]

Kentucky's 4th State Senate district
Senator	Robby Mills R–Henderson since January 1, 2019
Registration	49.4% Democratic 41.7% Republican 8.4% No party preference
Demographics	86.3% White 6.4% Black 3.1% Hispanic 0.3% Asian 0.2% Native American 0.1% Hawaiian/Pacific Islander 3.6% Multiracial
Population (2023)	115,888
Registered voters (2025)	88,529

From 1942 to 1945, the district was represented by Earle Clements, who would later be elected governor and U.S. senator from Kentucky. From 1894 to 1897, the district was represented by William J. Deboe, who was elected U.S. senator from Kentucky in 1897.

Voter registration

On January 1, 2025, the district had 88,529 registered voters, who were registered with the following parties.

Party		Registration
		Voters	%
	Democratic	43,765	49.44
	Republican	36,884	41.66
	Independent	3,054	3.45
	Libertarian	336	0.38
	Constitution	53	0.06
	Green	44	0.05
	Socialist Workers	9	0.01
	Reform	6	0.01
	"Other"	4,378	4.95
Total		88,529	100.00
Source: Kentucky State Board of Elections

Election results from statewide races

2002 – 2012

Year	Office	Results[a]
2002	Senator	McConnell 62.0 - 38.0%
	Amendment 1	77.3 - 22.7%
	Amendment 2	64.4 - 35.6%
2003	Governor	Chandler 51.6 - 48.4%
	Secretary of State	Maple 60.2 - 39.8%
	Attorney General	Stumbo 61.5 - 35.3%
	Auditor of Public Accounts	Luallen 57.9 - 42.1%
	State Treasurer	Miller 64.0 - 36.0%
	Commissioner of Agriculture	Baesler 52.9 - 47.1%
2004	President	Bush 58.7 - 40.7%
	Senator	Mongiardo 51.7 - 48.3%
	Amendment 1	82.4 - 17.6%
2007	Governor	Beshear 66.1 - 33.9%
	Secretary of State	Hendrickson 56.3 - 43.7%
	Attorney General	Conway 73.0 - 27.0%
	Auditor of Public Accounts	Luallen 65.7 - 34.3%
	State Treasurer	Hollenbach 64.4 - 35.6%
	Commissioner of Agriculture	Farmer 52.8 - 47.2%
2008	President	McCain 54.2 - 44.0%
	Senator	Lunsford 52.4 - 47.6%
2010	Senator	Paul 52.2 - 47.8%
2011	Governor	Beshear 64.5 - 31.4%
	Secretary of State	Grimes 63.1 - 36.9%
	Attorney General	Conway 54.5 - 45.5%
	Auditor of Public Accounts	Edelen 57.6 - 42.4%
	State Treasurer	Hollenbach 58.3 - 38.5%
	Commissioner of Agriculture	Comer 59.7 - 40.3%
2012	President	Romney 62.5 - 36.0%
	Amendment 1	88.3 - 11.7%

2014 – 2020

Year	Office	Results[a]
2014	Senator	McConnell 58.2 - 38.7%
2015	Governor	Bevin 52.4 - 44.9%
	Secretary of State	Grimes 52.9 - 47.1%
	Attorney General	Beshear 53.9 - 46.1%
	Auditor of Public Accounts	Harmon 52.4 - 47.6%
	State Treasurer	Ball 56.8 - 43.2%
	Commissioner of Agriculture	Quarles 58.1 - 41.9%
2016	President	Trump 70.3 - 26.0%
	Senator	Paul 61.1 - 38.9%
2019	Governor	Bevin 55.5 - 42.6%
	Secretary of State	Adams 59.4 - 40.6%
	Attorney General	Cameron 62.5 - 37.5%
	Auditor of Public Accounts	Harmon 60.2 - 36.8%
	State Treasurer	Ball 64.1 - 35.9%
	Commissioner of Agriculture	Quarles 62.3 - 35.4%
2020	President	Trump 70.6 - 28.0%
	Senator	McConnell 63.9 - 31.3%
	Amendment 1	59.9 - 40.1%
	Amendment 2	68.4 - 31.6%

2022 – present

Year	Office	Results[a]
2022	Senator	Paul 69.2 - 30.8%
	Amendment 1	51.9 - 48.1%
	Amendment 2	53.6 - 46.4%
2023	Governor	Cameron 51.0 - 49.0%
	Secretary of State	Adams 63.3 - 36.7%
	Attorney General	Coleman 63.1 - 36.9%
	Auditor of Public Accounts	Ball 63.2 - 36.8%
	State Treasurer	Metcalf 62.3 - 37.7%
	Commissioner of Agriculture	Shell 64.7 - 35.3%
2024	President	Trump 71.5 - 27.3%
	Amendment 1	64.4 - 35.6%
	Amendment 2	65.5 - 34.5%

List of members representing the district

Member	Party	Years	Electoral history	District location
William Sullivan (Henderson)	Democratic	January 1, 1966 – January 1, 1982	Elected in 1965. Reelected in 1969. Reelected in 1973. Reelected in 1977. Retired.	1964–1972
				1972–1974
				1974–1984
Henry G. Lackey (Henderson)	Democratic	January 1, 1982 – January 1, 1987	Elected in 1981. Lost renomination.
				1984–1993 Crittenden, Henderson, Livingston, Lyon, Union, and Webster Counties.
John Hall (Henderson)	Democratic	January 1, 1987 – January 1, 1991	Elected in 1986. Lost renomination.
Henry G. Lackey (Henderson)	Democratic	January 1, 1991 – January 1, 1995	Elected in 1990. Retired to run for Kentucky's 1st congressional district.
				1993–1997
Paul Herron (Henderson)	Democratic	January 1, 1995 – June 16, 2004	Elected in 1994. Reelected in 1998. Reelected in 2002. Died.
				1997–2003
				2003–2015
Dorsey Ridley (Henderson)	Democratic	July 2004 – January 1, 2019	Elected to finish Herron's term. Reelected in 2006. Reelected in 2010. Reelected in 2014. Lost reelection.
				2015–2023
Robby Mills (Henderson)	Republican	January 1, 2019 – present	Elected in 2018. Reelected in 2022.
				2023–present

Elections

2022

Main article: 2022 Kentucky Senate election

2018

Main article: 2018 Kentucky Senate election

2014

Main article: 2014 Kentucky Senate election

2010

Main article: 2010 Kentucky Senate election

2004 special

Main article: 2004 Kentucky Senate election § District 4 special

Notes

1. Figures presented in this table are calculated by summing precinct election results published by the Kentucky State Board of Elections, using precinct data that list each precinct's senatorial district.