State Highway 115 (abbreviated SH-115 or OK-115) is a 57.2 mile (92 km) long state highway in western Oklahoma, passing through Comanche, Kiowa, and Washita Counties as well as the Wichita Mountains Wildlife Refuge. The highway has no lettered spur routes. Most of the highway was established in 1957 as a gravel roadway. Between then and 1967, it was gradually paved. A portion of the highway through the Wichita Mountains was removed from the route in the mid-1960s, but was re-added in 1984.