List of U.S. Highways in Louisiana

The U.S. Highway System in Louisiana consists of 2,490.851 miles (4,008.636 km) of mainline highway routes and 107.785 miles (173.463 km) of special routes (both figures including concurrencies) that are constructed and maintained by the Louisiana Department of Transportation and Development (La DOTD).^[1]

U.S. Highways of the Louisiana Highway System
Highway markers from different years: 1928 (left), 1948 (center), 1970–present (right)
System information
Maintained by La DOTD
Length	2,598.636 mi[1] (4,182.099 km)
Formed	November 11, 1926 (1926-11-11) (designated);[2] February 1928 (signed)[3]
Highway names
US Highways	U.S. Highway X (US X)
Special routes:	U.S. Highway X Business (US X Bus.); U.S. Highway X Bypass (US X Byp.); U.S. Highway X Truck (US X Truck)
System links
Louisiana State Highway System Interstate US State Scenic

Mainline routes

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 11	31.153	50.136	US 90 in New Orleans	Mississippi state line north of Pearl River	01939-01-011939[4]	current
US 51	68.925	110.924	US 61 in LaPlace	Mississippi state line north of Kentwood	01926-01-011926[2]	current
US 61	121.644	195.767	US 90 in New Orleans	Mississippi state line north of St. Francisville	01926-01-011926[2]	current
US 63	35.351	56.892	I-20/US 167/LA 146 in Ruston	Arkansas state line at Junction City	01999-01-011999[5]	current	Entire route co-signed with US 167; only U.S. highway in Louisiana with same number as a current state route (LA 63)
US 65	100.77	162.17	US 425/LA 15 in Clayton	Arkansas state line north of Lake Providence	01926-01-011926[2]	current
US 71	231.099	371.918	US 190 west of Krotz Springs	Arkansas state line at Ida	01926-01-011926[2]	current
US 79	88.246	142.018	Texas state line southwest of Greenwood	Arkansas state line north of Haynesville	01935-01-011935[6]	current
US 80	199.850	321.627	Texas state line west of Greenwood	Mississippi state line at Vicksburg, MS	01926-01-011926[2]	current
US 84	182.851	294.270	Texas state line at Logansport	Mississippi state line at Natchez, MS	01935-01-011935[6]	current
US 90	297.6	478.9	Texas state line at Orange, TX	Mississippi state line at Pearlington, MS	01926-01-011926[2]	current	Lafayette–New Orleans segment projected to become part of I-49
US 165	228.319	367.444	US 90 east of Lake Charles	Arkansas state line north of Bonita	01926-01-011926[2]	current
US 167	241.046	387.926	LA 14 in Abbeville	Arkansas state line at Junction City	01926-01-011926[2]	current
US 171	177.441	285.564	US 90/LA 14 in Lake Charles	US 79/US 80/LA 3094 in Shreveport	01926-01-011926[2]	current	Only U.S. Highway completely within Louisiana; intersects US 71 via LA 3094 in Shreveport
US 190	280.8	451.9	Texas state line west of Merryville	US 90 in White Kitchen, near Slidell	01926-01-011926[2]	current
US 371	84.140	135.410	I-49/LA 177 southwest of Coushatta	Arkansas state line at Springhill	01994-01-011994[7]	current
US 425	120.969	194.681	Mississippi state line at Natchez, MS	Arkansas state line north of Bastrop	01989-01-011989[8]	current

Current special routes

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 51 Bus.	8.837	14.222	South of Ponchatoula	Hammond	01960-01-011960[9]	current	La DOTD designation: US 51-X
US 61 Bus.	11.098	17.860	Baton Rouge	Baton Rouge	01960-01-011960[9]	current	La DOTD designation: US 61-X; entire route duplicated by US 190 Bus.
US 71 Byp.	6.530	10.509	Alexandria	Alexandria	01994-01-011994[10]	current	Entire route follows I-49
US 79 Byp.	5.223	8.406	South of Homer	Homer	02011-01-012011[11]	current	La DOTD designation: US 79-B
US 79 Truck	4.417	7.108	Minden	Minden	—	—	Route follows combination of local roads, US 80, and LA 531
US 80 Truck	0.284	0.457	Arcadia	Arcadia	—	—	Route follows LA 798-1 and LA 151
US 80 Truck	0.158	0.254	Gibsland	Gibsland	—	—	Entire route follows LA 799
US 80 Truck	0.470	0.756	Minden	Minden	—	—	Entire route follows US 79 Truck
US 84 Bus.	0.733	1.180	Mansfield	Mansfield	02010-01-012010[12]	current	La DOTD designation: US 84-B
US 90 Bus.	2.633	4.237	Lafayette	Lafayette	01965-01-011965[13]	current	La DOTD designation: US 90-Y
US 90 Bus.	3.207	5.161	Lake Charles	Lake Charles	01963-01-011963[14]	current	La DOTD designation: US 90-X
US 90 Bus.	8.158	13.129	Morgan City	East of Amelia	01999-01-011999[5]	current	La DOTD designation: US 90-W
US 90 Bus.	14.580	23.464	West of Westwego	New Orleans	01960-01-011960[15][16]	current	La DOTD designation: US 90-Z
US 165 Bus.	6.073	9.774	Alexandria	Pineville	01963-01-011963[14]	current	La DOTD designation: US 165-X
US 165 Bus.	9.688	15.591	South of Richwood	Monroe	01970-01-011970[17]	current	La DOTD designation: US 165-Y
US 167 Bus.	4.306	6.930	Alexandria	Alexandria	01994-01-011994[10]	current	La DOTD designation: US 167-X
US 171 Bus.	3.113	5.010	East of Zwolle	North of Zwolle	02008-01-012008[18]	current	La DOTD designation: US 171-X
US 190 Bus.	10.982	17.674	Baton Rouge	Baton Rouge	01960-01-011960[9]	current	La DOTD designation: US 61-X; entire route duplicates US 61 Bus.
US 190 Bus.	3.306	5.320	Covington	Covington	01969-01-011969[19]	current	La DOTD designation: US 190-X
US 190 Bus.	3.937	6.336	Slidell	East of Slidell	01971-01-011971[20]	current	La DOTD designation: US 190-Y; official mileage does not reflect entire signed route
US 190 Spur	0.052	0.084	Kinder	Kinder	—	—	La DOTD designation: US 190-S; un-signed route

Former special routes

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 61 Bus.	2.46	3.96	St. Francisville	St. Francisville	01960-01-011960[9]	02012-01-012012	Route followed LA 3057 and LA 10 (now LA 1263)
US 61 Byp.	6.6	10.6	Baton Rouge	Baton Rouge	01947-01-011947[21]	01963-01-011963[14]	Entire route duplicated by US 65 Byp. until 1951 and US 190 Byp. after 1954; replaced by mainline US 61
US 65 Byp.	10.4	16.7	Nesser	Baton Rouge	01947-01-011947[21]	01951-01-011951[22]	Entire route duplicated US 61 Byp.; deleted when US 65 southern terminus moved to Natchez, MS
US 71 Bus.	4.5	7.2	Alexandria	Alexandria	01947-01-011947[21]	01951-01-011951[22]	Replaced by mainline US 71
US 71 Bus.	4.6	7.4	Alexandria	Alexandria	01963-01-011963[14]	01981-01-011981[23]	Replaced by re-routed US 167 and existing state highways
US 71 Byp.	4.8	7.7	Alexandria	Alexandria	01951-01-011951[22]	01963-01-011963[14]	Entire route duplicated by US 167 Byp.; replaced by mainline US 71
US 80 Alt.	3.7	6.0	East of Bossier City	Shreveport	01937-01-011937[24]	01939-01-011939[25]	Alternate Red River crossing
US 90 Alt.	3	4.8	New Orleans	New Orleans	01935-01-011935	01936-01-011936
US 90 Bus.	2.7	4.3	Lafayette	Lafayette	01947-01-011947[21]	01951-01-011951[22]	Replaced by mainline US 90
US 90 Byp.	2.1	3.4	Lafayette	Lafayette	01951-01-011951[22]	01956-01-011956[26]	Replaced by mainline US 90
US 165 Byp.	8.8	14.2	Alexandria	North of Pineville	01951-01-011951[22]	01963-01-011963[14]	Replaced by mainline US 165
US 165 Byp.	7.9	12.7	Rilla	Monroe	01965-01-011965[13]	01970-01-011970[17]	Replaced by mainline US 165
US 167 Byp.	1.3	2.1	Lafayette	Lafayette	01955-01-011955[27]	01956-01-011956[26]	Entire route followed US 90 Byp.; replaced by mainline US 167
US 167 Byp.	4.8	7.7	Alexandria	Alexandria	01951-01-011951[22]	01963-01-011963[14]	Entire route duplicated US 71 Byp.; replaced by mainline US 167
US 190 Byp.	6.6	10.6	Baton Rouge	Baton Rouge	01947-01-011947[21]	01963-01-011963[14]	Entire route followed US 61 Byp. (and US 65 Byp. until 1951); replaced by mainline US 190
US 190 Spur	0.74	1.19	Hammond	Hammond	—	01991-01-011991	Replaced by LA 3260

See also

• United States portal
• U.S. Roads portal