LA 40

Louisiana Highway 40
Route of LA 40 highlighted in red
Route information
Maintained by Louisiana DOTD
Length:	53.108 mi (85.469 km)
Existed:	1955 renumbering – present
Major junctions
West end:	LA 43 south of Montpelier
	I-55 west of Independence US 51 in Independence LA 25 in Folsom LA 21 in Bush
East end:	LA 41 in Bush
Location
Parishes:	Livingston, Tangipahoa, St. Tammany
Highway system
Louisiana Highway System Interstate US State Scenic ← LA 39 LA 41 →

Louisiana Highway 40 (LA 40) is a state highway located in southeastern Louisiana. It runs 53.11 miles (85.47 km) in an east–west direction from LA 43 south of Montpelier to LA 41 in Bush.

The route travels through the rural area between the parallel corridors of U.S. Highway 190 (US 190) and LA 21 to the south and LA 16 to the north. It connects several small population centers in Tangipahoa and St. Tammany parishes. These include the town of Independence, the village of Folsom, and the unincorporated communities of Loranger and Bush. LA 40 also connects Independence with Interstate 55 (I-55), the area's primary route to the New Orleans area. Further east, the highway provides access to the Global Wildlife Center, a popular wildlife and game preserve located west of Folsom.

LA 40 was designated in the 1955 Louisiana Highway renumbering from portions of several former routes, primarily State Route 408, State Route 1080, and State Route 189. Two portions of LA 40 are scheduled to be eliminated from the state highway system in the future as part of the Louisiana Department of Transportation and Development (La DOTD) Road Transfer Program.