List of state highways in Louisiana (3100–3149)

Louisiana Highway 3100 (LA 3100) runs in a general east–west direction from US 165 Bus. to the junction of US 167 and LA 28 in Pineville. The route has a spur that travels along Donohue Ferry Road from LA 3100 to Expressway Drive. LA 3100 heads northeast from US 165 Bus. (Military Highway) just north of the latter's entrance to Louisiana College. It travels along Donohue Ferry Road through a residential neighborhood. After crossing over the Kansas City Southern Railway (KCS) line, LA 3100 intersects LA 3100 Spur at Griffith Street. The spur route proceeds north on Donohue Ferry Road while LA 3100 turns southeast onto Griffth Street as signs direct motorists toward LA 28. LA 3100 proceeds a short distance past Lessie Moore Elementary School to a diamond interchange with US 167 and LA 28, connecting to Alexandria, Winnfield, and Jonesville. LA 3100 is an undivided two-lane highway with a center turning lane for its entire length. LA 3100 was added to the state highway system in 1964, creating a state-maintained connection between the new Pineville Expressway and US 165 Bus. (Military Highway) along existing roadways. ==Louisiana Highway 3101==

Louisiana Highway 3101 (LA 3101) runs in Catahoula Parish. ==Louisiana Highway 3102==

Louisiana Highway 3102 (LA 3102) runs from Larto to Argo in Catahoula Parish. ==Louisiana Highway 3103==

Louisiana Highway 3103 (LA 3103) ran in an east–west direction, looping off of US 84 in Mansfield, DeSoto Parish. The route followed a short section of US 84 bypassed in the 1960s. From the west, LA 3103 headed northeast on Kings Highway past Mansfield High School, then curved due east onto McEnery Street. After crossing the present alignment of US 84 and US 171, the route continued a short distance to the contemporary alignment at Washington Avenue, now designated as US 84 Business. ==Louisiana Highway 3104==

Louisiana Highway 3104 (LA 3104) runs in a north–south direction from LA 8 to the concurrent US 84/LA 772 in Midway, LaSalle Parish. It is an undivided two-lane highway for its entire length. ==Louisiana Highway 3105==

Louisiana Highway 3105 (LA 3105) runs in a north–south direction from US 71 to the end of state maintenance at the northern boundary of the Bossier City city limits in Bossier Parish. The route starts at Barksdale Boulevard (US 71), and heads northeast on Airline Drive. It crosses the Kansas City Southern railroad tracks, curving to the north-northwest and intersecting LA 72. Shortly after, it has a diamond interchange with I-20 (unsigned on I-20). It intersects the concurrent US 79/US 80 and curves to the north shortly after, having another diamond interchange with I-220. The route ends later at the northern boundary of the Bossier City city limits, while Airline Drive continues north. LA 3105 is an undivided four-lane highway, except for its interchanges at I-20 and I-220 where it briefly becomes divided. Prior to 2023, its southern terminus went beyond US 71 and ended at Arthur Ray Teague Pkwy. ==Louisiana Highway 3107==

Louisiana Highway 3107 (LA 3107) ran in an east–west direction along Talbot Avenue from LA 309 west of Thibodaux to LA 20 in Thibodaux, Lafourche Parish. The route headed east from LA 309 (Brule Guillot Road) in an area known as Brule. En route to Thibodaux, it intersected LA 3185 (West Thibodaux Bypass Road). Near the end of its route it briefly crossed into Terrebonne Parish before re-entering Lafourche Parish. LA 3107 then reached its eastern terminus at LA 20 (Canal Boulevard) in Thibodaux, just north of Schriever. LA 3107 was an undivided two-lane highway for its entire length. ==Louisiana Highway 3110==

Louisiana Highway 3110 (LA 3110) was a Louisiana state highway located in Natchitoches. The LA 3110 designation was a temporary designation used for the LA 1 bypass during construction. Once construction was completed, the LA 3110 designation was removed and LA 1 was re-rerouted onto the bypass. ==Louisiana Highway 3112==

Louisiana Highway 3112 (LA 3112) runs 1.64 miles in an east–west direction, from LA 109 in Vinton and ending near Toomey in western Calcasieu Parish, near the Louisiana-Texas border. In 2017 it was proposed for deletion as part of La DOTD's Road Transfer program. ==Louisiana Highway 3113==

Louisiana Highway 3113 (LA 3113) ran in an east–west direction, connecting Port Hudson National Cemetery with US 61 north of Baton Rouge, East Baton Rouge Parish. It was an undivided two-lane highway for its entire length. The route was deleted in 2018 as part of the La DOTD's Road Transfer program. ==Louisiana Highway 3114==

Louisiana Highway 3114 (LA 3114) was a state highway in Louisiana that served St. Tammany Parish. It spanned a total of along the present route of U.S. 190 on the north side of Covington. ==Louisiana Highway 3115==

Louisiana Highway 3115 (LA 3115) runs in a north–south direction from LA 75 to LA 74 in St. Gabriel, Iberville Parish. The route heads northeast from LA 75, which follows the east bank levee of the Mississippi River, and passes a series of industrial facilities in an otherwise rural area within the St. Gabriel city limits. After intersecting LA 30, the highway reaches its terminus at LA 74. Both routes connect St. Gabriel with the nearby I-10 and US 61 corridors. LA 3115 is an undivided two-lane highway for its entire length. ==Louisiana Highway 3116==

Louisiana Highway 3116 (LA 3116) runs in Eunice. It runs from LA 13 in the Acadia Parish part of Eunice to LA 91 in the St. Landry Parish part of Eunice. ==Louisiana Highway 3118==

Louisiana Highway 3118 (LA 3118) runs in Fort Jesup, Sabine Parish. ==Louisiana Highway 3120==

Louisiana Highway 3120 (LA 3120) runs in a northwest to southeast direction from LA 18 to LA 70 east of Donaldsonville, Ascension Parish. The route is a short connector, originally constructed around 1964 as part of LA 3089. It was the main route connecting Donaldsonville with the Sunshine Bridge across the Mississippi River until LA 3089 was re-routed and extended directly into town in the mid-1970s. LA 3120 is an undivided two-lane highway for its entire length. ==Louisiana Highway 3121==

Louisiana Highway 3121 (LA 3121) runs in a north–south direction from the LA 15 in Spearsville to LA 558 at Lockhart. The route has a spur that travels from LA 3121 to a dead end at the village's abandoned school property. A second spur was renumbered as LA 3269 in the early 1990s. ==Louisiana Highway 3123==

Louisiana Highway 3123 (LA 3123) is a two-lane state highway that travels just south of the city limits of Eunice in Acadia Parish. It is long, carries the name Tiger Lane, and is two lanes wide for its entire length. It begins at LA 755 in front of the Louisiana State University at Eunice campus. The highway heads to the southeast passing the entrance to Eunice Airport then passing some homes before curving to the east. Near its end, LA 3123 intersects LA 3116, crosses a railroad at-grade, and ends at LA 13. ==Louisiana Highway 3124==

Louisiana Highway 3124 (LA 3124) runs in Bogalusa, Washington Parish. ==Louisiana Highway 3125==

Louisiana Highway 3125 (LA 3125) runs in an east–west direction from LA 70 south of Sorrento to the junction of LA 641 and LA 3213 east of Gramercy. The route spans the distance between the approaches to two bridges across the Mississippi River, the Sunshine Bridge on LA 70 and the Gramercy Bridge on LA 3213. It is a two-lane highway that provides a bypass of the older and winding River Road (LA 44), facilitating truck traffic through the industrial corridor along the river. Along the way, LA 3125 cuts across a sharp bend in the river at Convent. Near the end of its route, it passes through the adjacent unincorporated communities of Lutcher and Gramercy, terminating just south of a junction with US 61 (Airline Highway). ==Louisiana Highway 3127==

Louisiana Highway 3127 (LA 3127) is a state highway in Louisiana that serves Ascension, St. James, St. John the Baptist, and St. Charles Parishes. ==Louisiana Highway 3128==