List of U.S. Highways in Louisiana

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:	2,599.37 mi (4,183.28 km)
Formed:	November 11, 1926 (1926-11-11) (designated); Summer 1928 (signed)
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 Highway System Interstate US State

The U.S. Highway System in Louisiana consists of 2,495.31 miles (4,015.81 km) of mainline highway routes and 104.06 miles (167.47 km) of special routes (both figures including concurrencies) that are constructed and maintained by the Louisiana Department of Transportation and Development (La DOTD).