List of U.S. Highways in Louisiana
# 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).

## Mainline routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| - | - | - | - | - | - | - | - |
| US 11 | 31.164 | 50.154 | US 90 in New Orleans | Mississippi state line north of Pearl River | 01939-01-011939 | current | |
| US 51 | 68.925 | 110.924 | US 61 in LaPlace | Mississippi state line north of Kentwood | 01926-01-011926 | current | |
| US 61 | 121.644 | 195.767 | US 90 in New Orleans | Mississippi state line north of St. Francisville | 01926-01-011926 | current | |
| US 63 | 35.351 | 56.892 | I-20/US 167/LA 146 in Ruston | Arkansas state line at Junction City | 01999-01-011999 | 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 | 100.771 | 162.175 | US 425/LA 15 in Clayton | Arkansas state line north of Lake Providence | 01926-01-011926 | current | |
| US 71 | 231.099 | 371.918 | US 190 west of Krotz Springs | Arkansas state line at Ida | 01926-01-011926 | current | |
| US 79 | 88.246 | 142.018 | Texas state line southwest of Greenwood | Arkansas state line north of Haynesville | 01935-01-011935 | current | |
| US 80 | 199.850 | 321.627 | Texas state line west of Greenwood | Mississippi state line at Vicksburg, MS | 01926-01-011926 | current | |
| US 84 | 182.851 | 294.270 | Texas state line at Logansport | Mississippi state line at Natchez, MS | 01935-01-011935 | current | |
| US 90 | 298.213 | 479.927 | Texas state line at Orange, TX | Mississippi state line at Pearlington, MS | 01926-01-011926 | 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 | current | |
| US 167 | 240.721 | 387.403 | LA 14 in Abbeville | Arkansas state line at Junction City | 01926-01-011926 | current | |
| US 171 | 177.453 | 285.583 | US 90/LA 14 in Lake Charles | US 79/US 80/LA 3094 in Shreveport | 01926-01-011926 | current | Only U.S. Highway completely within Louisiana; intersects US 71 via LA 3094 in Shreveport |
| US 190 | 281.135 | 452.443 | Texas state line west of Merryville | US 90 southeast of Slidell | 01926-01-011926 | current | |
| US 371 | 84.140 | 135.410 | I-49/LA 177 southwest of Coushatta | Arkansas state line at Springhill | 01994-01-011994 | current | |
| US 425 | 120.969 | 194.681 | Mississippi state line at Natchez, MS | Arkansas state line north of Bastrop | 01989-01-011989 | current | |

## Current special routes

| Number | Length (mi) | 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 | current | La DOTD designation: US 51-X |
| US 61 Bus. | 11.098 | 17.860 | Baton Rouge | Baton Rouge | 01960-01-011960 | 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 | current | Entire route follows I-49 |
| US 79 Byp. | 5.223 | 8.406 | South of Homer | Homer | 02011-01-012011 | 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 | current | La DOTD designation: US 84-B |
| US 90 Bus. | 2.633 | 4.237 | Lafayette | Lafayette | 01965-01-011965 | current | La DOTD designation: US 90-Y |
| US 90 Bus. | 3.207 | 5.161 | Lake Charles | Lake Charles | 01963-01-011963 | current | La DOTD designation: US 90-X |
| US 90 Bus. | 8.158 | 13.129 | Morgan City | East of Amelia | 01999-01-011999 | current | La DOTD designation: US 90-W |
| US 90 Bus. | 14.580 | 23.464 | West of Westwego | New Orleans | 01960-01-011960 | current | La DOTD designation: US 90-Z |
| US 165 Bus. | 6.073 | 9.774 | Alexandria | Pineville | 01963-01-011963 | current | La DOTD designation: US 165-X |
| US 165 Bus. | 9.688 | 15.591 | South of Richwood | Monroe | 01970-01-011970 | current | La DOTD designation: US 165-Y |
| US 167 Bus. | 4.306 | 6.930 | Alexandria | Alexandria | 01994-01-011994 | current | La DOTD designation: US 167-X |
| US 171 Bus. | 3.113 | 5.010 | East of Zwolle | North of Zwolle | 02008-01-012008 | current | La DOTD designation: US 171-X |
| US 190 Bus. | 10.982 | 17.674 | Baton Rouge | Baton Rouge | 01960-01-011960 | 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 | current | La DOTD designation: US 190-X |
| US 190 Bus. | 3.937 | 6.336 | Slidell | East of Slidell | 01971-01-011971 | 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 | 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 | 01963-01-011963 | 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 | 01951-01-011951 | 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 | 01951-01-011951 | Replaced by mainline US 71 |
| US 71 Bus. | 4.6 | 7.4 | Alexandria | Alexandria | 01963-01-011963 | 01981-01-011981 | Replaced by re-routed US 167 and existing state highways |
| US 71 Byp. | 4.8 | 7.7 | Alexandria | Alexandria | 01951-01-011951 | 01963-01-011963 | 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 | 01939-01-011939 | 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 | 01951-01-011951 | Replaced by mainline US 90 |
| US 90 Byp. | 2.1 | 3.4 | Lafayette | Lafayette | 01951-01-011951 | 01956-01-011956 | Replaced by mainline US 90 |
| US 165 Byp. | 8.8 | 14.2 | Alexandria | North of Pineville | 01951-01-011951 | 01963-01-011963 | Replaced by mainline US 165 |
| US 165 Byp. | 7.9 | 12.7 | Rilla | Monroe | 01965-01-011965 | 01970-01-011970 | Replaced by mainline US 165 |
| US 167 Byp. | 1.3 | 2.1 | Lafayette | Lafayette | 01955-01-011955 | 01956-01-011956 | Entire route followed US 90 Byp.; replaced by mainline US 167 |
| US 167 Byp. | 4.8 | 7.7 | Alexandria | Alexandria | 01951-01-011951 | 01963-01-011963 | 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 | 01963-01-011963 | 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 |
