State Route 91 (SR 91), formerly known as Inter-county Highway 91 until 1921 and State Highway 91 in 1922, is a north–south state highway in the northeastern portion of the U.S. state of Ohio. Its southern terminus is at U.S. Route 224 (East Waterloo Road) in Springfield Township, east of Akron. Its northern terminus is at State Route 283 (Lakeshore Boulevard) on the Timberlake/Eastlake border less than one mile (1.6 km) south of Lake Erie.