Louisiana Highway 139

Louisiana Highway 139
Route of LA 139 highlighted in red
Route information
Maintained by Louisiana DOTD
Length	20.203 mi[1] (32.514 km)
Existed	1955 renumbering–present
Major junctions
South end	US 80 in Monroe
Major intersections	LA 134 southeast of Sterlington
North end	US 165 / US 425 / LA 2 / LA 593 in Bastrop
Location
Country	United States
State	Louisiana
Parishes	Ouachita, Morehouse
Highway system
Louisiana State Highway System Interstate US State Scenic
← LA 138 → LA 140

Louisiana Highway 139 (LA 139) is a state highway located in northeastern Louisiana. It runs 20.20 miles (32.51 km) in a north–south direction from U.S. Highway 80 (US 80) in Monroe to the junction of US 165, US 425, LA 2, and LA 593 in Bastrop.

The route is one of two connecting Monroe and Bastrop, the seats of Ouachita Parish and Morehouse Parish, respectively. It runs parallel to US 165 and traverses the eastern suburbs of Monroe, skirting the east bank of Bayou DeSiard. North of Swartz, LA 139 travels through rural surroundings until reaching Bastrop, where it serves as the main north–south thoroughfare on the south side of town.

LA 139 was designated in the 1955 Louisiana Highway renumbering from a portion of former State Route 14. It also served as the original alignment of US 165 from 1926 until its re-routing in 1937. As originally designated, LA 139 continued north from Bastrop to the Arkansas state line along the pre-1955 State Route 204. In 1989, this portion was transferred to the newly created US 425, shortening the route of LA 139 by almost 17 miles (27 km).