Arkansas Highway 13 (AR 13 and Hwy. 13) is a designation for three state highways in central Arkansas. The longest segment of 54.58 miles (87.84 km) runs from US Highway 79 in Humphrey to Campground Road east of Beebe. There exist two short segments in White County; one running 5.03 miles (8.10 km) from Highway 267 in McRae to Highway 367 and the other running 6.13 miles (9.87 km) from Highway 367 in Judsonia to Highway 258.

Highway 13 starts east of Beebe and heads south to AR 38/Hickory Plain, and a crossing of both I-40 and AR 70 in Carlisle. The route continues south to US 167/Humnoke and to US 63/US 79 at Humphrey, where the route terminates.

The route begins in McRae at Arkansas Highway 267 and runs north across US 67/US 167, which are concurrent. Highway 13 is Exit 35 on the converged US Routes. The route heads north to terminate at Arkansas Highway 367 southwest of Searcy.

The route begins at Highway 367 near Friendly Acres Park and runs west as Missile Base Road. Highway 13 passes over US 64/US 67/US 167 but does not interchange with the route. After this bridging, AR 13 turns north to intersect AR 157 before terminating at AR 258 near the Emmett Miller House.

Arkansas Highway 13 was one of the original 1926 state highways. The route ran about 90 miles (140 km) from U.S. Route 65 south of Pine Bluff to the Louisiana state line, changing to LA 139. The northern portion of the route was replaced by Arkansas Highway 81, with the entire route being replaced by U.S. Route 425 when it was commissioned in 1989.