MarketList of state highways in Louisiana (1–99)
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List of state highways in Louisiana (1–99)

The following is a list of state highways in the U.S. state of Louisiana designated in the 1–99 range.

Louisiana Highway 1
Louisiana Highway 1 (LA 1) runs in a southeast to northwest direction from a dead end in Grand Isle, Jefferson Parish to the Texas state line northwest of Rodessa, Caddo Parish. ==Louisiana Highway 2==
Louisiana Highway 2
Louisiana Highway 2 (LA 2) runs in an east–west direction from the Texas state line southwest of Vivian, Caddo Parish to US 65 north of Lake Providence, East Carroll Parish. ==Louisiana Highway 2 Alternate==
Louisiana Highway 2 Alternate
Louisiana Highway 2 Alternate (LA 2 Alt.) runs in an east–west direction from the junction of LA 2 and LA 159 in Shongaloo, Caddo Parish to the junction of US 63/US 167 and LA 2 in Bernice, Union Parish. ==Louisiana Highway 3==
Louisiana Highway 3
Louisiana Highway 3 (LA 3) runs in a north–south direction from the junction of I-20, US 71, and LA 72 in Bossier City to the Arkansas state line north of Plain Dealing, Bossier Parish. ==Louisiana Highway 4==
Louisiana Highway 4
Louisiana Highway 4 (LA 4) runs in an east–west direction from US 71 north of Loggy Bayou, Red River Parish to LA 605 in Newellton, Tensas Parish. ==Louisiana Highway 5==
Louisiana Highway 5
Louisiana Highway 5 (LA 5) runs in a general southwest to northeast direction from US 84 in Logansport to LA 175 at Kingston, DeSoto Parish. ==Louisiana Highway 6==
Louisiana Highway 6
Louisiana Highway 6 (LA 6) runs in a southwest to northeast direction from the Texas state line southwest of Many, Sabine Parish to the junction of US 71 and US 84 in Clarence, Natchitoches Parish. ==Louisiana Highway 7==
Louisiana Highway 7
Louisiana Highway 7 (LA 7) ran in a north–south direction from US 71 in Coushatta, Red River Parish to the Arkansas state line at Springhill, Webster Parish. The route was replaced with a part of U.S. Route 371 in 1994. ==Louisiana Highway 8==
Louisiana Highway 8
Louisiana Highway 8 (LA 8) runs in a southwest to northeast direction from the Texas state line west of Burr Ferry, Vernon Parish to the concurrent US 425/LA 15 in Sicily Island, Catahoula Parish. ==Louisiana Highway 9==
Louisiana Highway 9
Louisiana Highway 9 (LA 9) runs in a north–south direction from the concurrent US 71/US 84 in Campti, Natchitoches Parish to the concurrent US 63/US 167 at the ClaiborneUnion parish line in Junction City. ==Louisiana Highway 10==
Louisiana Highway 10
Louisiana Highway 10 (LA 10) runs in an east–west direction from US 171 south of Leesville, Vernon Parish to the Mississippi state line east of Bogalusa, Washington Parish. ==Louisiana Highway 12==
Louisiana Highway 12
Louisiana Highway 12 (LA 12) runs in an east–west direction from the Texas state line west of Starks, Calcasieu Parish to the junction of US 171 and US 190 in Ragley, Beauregard Parish. ==Louisiana Highway 13==
Louisiana Highway 13
Louisiana Highway 13 (LA 13) runs in a north–south direction from LA 14 west of Kaplan, Vermilion Parish to US 167 in Turkey Creek, Evangeline Parish. ==Louisiana Highway 14==
Louisiana Highway 14
Louisiana Highway 14 (LA 14) runs in an east–west direction from the junction of US 90 and US 171 in Lake Charles, Calcasieu Parish to LA 182 in New Iberia, Iberia Parish. ==Louisiana Highway 15==
Louisiana Highway 15
Louisiana Highway 15 (LA 15) runs in a north–south direction from the junction of LA 1 and LA 970 northwest of Lettsworth, Pointe Coupee Parish to the concurrent US 63/US 167 in Lillie, Union Parish. ==Louisiana Highway 16==
Louisiana Highway 16
Louisiana Highway 16 (LA 16) runs in a general east–west direction from LA 22 south of French Settlement, Livingston Parish to LA 21 in Sun, Washington Parish. ==Louisiana Highway 17==
Louisiana Highway 17
Louisiana Highway 17 (LA 17) runs in a north–south direction from the junction of US 425/LA 15, LA 4, and LA 130 in Winnsboro, Franklin Parish to the Arkansas state line at Kilbourne, West Carroll Parish. ==Louisiana Highway 18==
Louisiana Highway 18
Louisiana Highway 18 (LA 18) runs in an east–west direction from the junction of LA 1 and LA 3089 in Donaldsonville, Ascension Parish to the junction of US 90 Bus. and LA 23 in Gretna, Jefferson Parish. ==Louisiana Highway 19==
Louisiana Highway 19
Louisiana Highway 19 (LA 19) runs in a north–south direction from US 61 in Baton Rouge, East Baton Rouge Parish to the Mississippi state line north of Norwood, East Feliciana Parish. ==Louisiana Highway 20==
Louisiana Highway 20
Louisiana Highway 20 (LA 20) runs in a southwest to northeast direction from LA 182 in Gibson, Terrebonne Parish to LA 18 in Vacherie, St. James Parish. ==Louisiana Highway 21==
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