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Route information | ||||
Maintained by ArDOT | ||||
Length | 99.14 mi[1] (159.55 km) | |||
Existed | 1926–present | |||
Major junctions | ||||
South end | ![]() | |||
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North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Arkansas | |||
Counties | Johnson, Newton, Madison, Carroll | |||
Highway system | ||||
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Highway 21 (AR 21, Ark. 21, and Hwy. 21) is a north–south state highway in north central Arkansas. The route of 99.14 miles (159.55 km) runs from US Route 64 (US 64) in Clarksville north across US 62 to Missouri Route 13 at the Missouri state line[2] The route is a two-lane highway with the exception of a brief concurrency with US 62, a four-lane highway, in Berryville.[1]