Johnson County is a county located in the U.S. state of Indiana. As of 2020, the population was 161,765. The county seat is Franklin. Johnson County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area.

Transportation

Transit

  • Access Johnson County

Major highways

  • 25px Interstate 65
  • 25px Interstate 69
  • 25px U.S. Route 31
  • 25px State Road 44
  • 25px State Road 135
  • 25px State Road 144
  • 25px State Road 252

Airport

  • KHFY - Greenwood Municipal Airport
  • 3FK - Franklin Flying Field

Geography

According to the 2010 census, the county has a total area of , of which (or 99.58%) is land and (or 0.42%) is water. This is probably John Johnson of Knox County, delegate to the State constitutional convention, appointed to the Supreme Court in 1816.

Cities and towns

  • Bargersville
  • Edinburgh (part)
  • Franklin
  • Greenwood
  • New Whiteland
  • Princes Lakes
  • Trafalgar
  • Whiteland

Extinct

  • Farwest

Townships

  • Blue River
  • Clark
  • Franklin-Union-Needham, which merged in January 2022
  • Hensley
  • Nineveh
  • Pleasant
  • White River

The south end of the county is also home to the Camp Atterbury military installation.

Climate and weather

In recent years, average temperatures in Franklin have ranged from a low of in January to a high of in July, although a record low of was recorded in January 1985 and a record high of was recorded in June 1988. Average monthly precipitation ranged from in January to in July.

Government

The county government is a constitutional body, and is granted specific powers by the Constitution of Indiana, and by the Indiana Code.

County Council: The county council is the legislative branch of the county government and controls all the spending and revenue collection in the county. Representatives are elected from county districts. The council members serve four-year terms. They are responsible for setting salaries, the annual budget, and special spending. The council also has limited authority to impose local taxes, in the form of an income and property tax that is subject to state level approval, excise taxes, and service taxes.

Board of Commissioners: The executive body of the county is made of a board of commissioners. The commissioners are elected county-wide, in staggered terms, and each serves a four-year term. One of the commissioners, typically the most senior, serves as president. The commissioners are charged with executing the acts legislated by the council, collecting revenue, and managing the day-to-day functions of the county government. The county also maintains three Superior Courts that also handle all types of cases, and also handle the small claims and juvenile cases. The judges on each of the courts is elected to a term of four years and must be a member of the Indiana Bar Association. and Indiana House of Representatives districts 47, 58, 65, and 93.

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Demographics