Johnson County is a county located in the U.S. state of Arkansas. As of the 2020 census, the population was 25,749. The county seat is Clarksville. Johnson County is Arkansas's 30th county, formed on November 16, 1833, from a portion of Pope County and named for Benjamin Johnson, a Territorial Judge. It is an alcohol prohibition or dry county.

Geography

According to the U.S. Census Bureau, the county has a total area of , of which is land and (3.4%) is water.

Major highways

  • 25px Interstate 40
  • 25px U.S. Route 64
  • 25px Arkansas Highway 21
  • 25px Arkansas Highway 103
  • 25px Arkansas Highway 109
  • 25px Arkansas Highway 123

Adjacent counties

  • Newton County (north)
  • Pope County (east)
  • Logan County (south)
  • Franklin County (west)
  • Madison County (northwest)

National protected area

  • Ozark National Forest (part)

Demographics