Johnson County

Clarksville
Coal Hill
Hartman
Knoxville
Lamar
HASC code :US-AR-JO
FIPS 6-4 code :05071
Capital :Clarksville
Largest city :Clarksville
Elevation :High : Coal Hill 472 ft
Low : Clarksville 370 ft
Population :22,781
Land Area :662 sq mi
(1,715 km²)
Density :34.41/sq mi
(13.29/km²)
Time zone :UTC -6