Indiana Counties
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Indiana Counties

Indiana is divided into ninety-two counties. The oldest and newest Counties in Indiana are Knox County (created 1790) and Newton County (created 1857).Many Indiana counties are named for the US Founding Fathers and personalities of the American Revolutionary War, the War of 1812 and Battle of Tippecanoe; early leaders of Indiana Territory and Indiana, as well as surrounding states like Michigan and Kentucky; plus Native American tribes and geographical features.

Johnson County, Indiana

Johnson County Education, Geography, and HistoryJohnson County, Indiana Courthouse

Johnson County is a county located in the state of Indiana. As of 2010, the population was 139,654. Johnson County was created on May 5, 1823. The county seat is Franklin. The county is named for John Johnson, first Chief Justice of the Indiana Supreme Court.

Johnson County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area.

Etymology - Origin of Johnson County Name

The county is named for Judge John Johnson, on of Indiana's 1st Supreme Court Judges.


County QuickFacts: CensusBureau Quick Facts

Johnson County History

Johnson County was Formally organized May 5, 1823. It was named for John Johnson, a judge of the Indiana Supreme Court. This is probably John Johnson of Knox County, delegate to the State constitutional convention, appointed to the Supreme Court in 1816.

Johnson County is divided into 9 Civil Townships as follows: Blue River, Clark, Franklin, Hensley, Needham, Nineveh, Pleasant, Union and White River.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 322 square miles (833 km2), of which 320 square miles (829 km2) is land and 1 square mile (4 km2) (0.42%) is water.

Johnson county is located close to the center of Indiana. The south end of the county is home to the Camp Atterbury military installation.

Neighboring Counties

Bordering counties are as follows:

  • North: Marion County
  • East: Shelby County
  • Southeast: Bartholomew County
  • Southwest: Brown County
  • West: Morgan County


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