The Lake of the Arbuckles is a reservoir located in southern Oklahoma, 8 miles (13 km) southwest of Sulphur in Murray County. The lake covers 2,350 acres (950 ha) and is a principal water supply reservoir for the city of Ardmore, some 30 mi (48 km) to the southwest. It also supplies water to the cities of Sulphur, Davis, Wynnewood and a large oil refinery near Wynnewood.