Highway 4 is a designation for two state highways in Arkansas. The western segment of 2.99 miles (4.81 km) runs from SH-4 at the Oklahoma state line and terminates in Cove. An eastern segment of 22.49 miles (36.19 km) begins at U.S. Route 278 (US 278) in McGehee and heads east to Arkansas City then north to Highway 1 before terminating. The two routes were formerly connected until a portion of approximately 230 miles (370 km) was redesignated US 278 in 1998. The eastern segment is part of the Great River Road.

State Highway 4, abbreviated as SH-4 or OK-4, is a designation for two distinct highways maintained by the U.S. state of Oklahoma. One of them serves as an important route through the suburbs west of Oklahoma City, while the other connects US-259 to the Arkansas state line west of Cove, Arkansas. SH-4 has no lettered spur routes.