Louisiana Highway 12 (LA 12) is a state highway located in southwestern Louisiana. It runs 34.64 miles (55.75 km) in an east–west direction from the Texas state line west of Starks to a junction with U.S. Highway 171 (US 171) and U.S. Highway 190 (US 190) in Ragley. LA 12 was created in the 1955 Louisiana Highway renumbering from the westernmost portion of former State Route 7, which was otherwise concurrent with US 190 through most of the state.