Arkansas Highway 15 (AR 15) is the designation for two state highways in Arkansas. The northern segment of 34.45 miles (55.44 km) runs from Altheimer north across Interstate 40 to Furlow. The southern segment of 21.10 miles (33.96 km) is entirely in Union County, and runs from Louisiana Highway 161 north to U.S. Route 82 in El Dorado.