Arkansas Highway 21

Highway 21
Highway 21
Route information
	Maintained by ArDOT
Length	99.14 mi (159.55 km)
Existed	1926–present
Major junctions
South end	US 64 in Clarksville
	US 62 in Berryville; US 412; AR 16
North end	Route 13, Missouri state line
Location
Country	United States
State	Arkansas
Counties	Johnson, Newton, Madison, Carroll
Highway system
	Arkansas Highway System; Interstate; US; State; Business; Spurs; Suffixed; Scenic; Heritage;

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 The route is a two-lane highway with the exception of a brief concurrency with US 62, a four-lane highway, in Berryville.

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