Louisiana Highway 104 (LA 104) is a state highway located in southwestern Louisiana. It runs 41.4 miles (66.6 km) in a west–east direction from LA 26 southeast of Oberlin to U.S. Highway 190 (US 190) in Opelousas. Along the way, it passes through the town of Mamou and intersects various north–south routes that service points along US 190 such as Elton, Basile, and Eunice. East of Mamou, connections are also made to Ville Platte, the St. Landry Parish seat, on US 167/LA 10.