Louisiana Highway 103 (LA 103) is a state highway in St. Landry Parish, Louisiana, United States, that spans 39.5 miles (63.6 km) in a wide semi-circle around the north side of Opelousas. The route is not bannered but runs in an overall west–east direction from U.S. Highway 190 (US 190) near Lawtell to LA 31 in Leonville. Along the way, it passes through the towns of Washington and Port Barre.