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Indiana Counties

Indiana is divided into 92 counties. The oldest and newest Counties in Indiana are Knox County (created 1790) and Newton County (created 1857).

The largest county is Allen (657 sq. mi.) and the smallest is Ohio (87 sq. mi.). According to the Indiana Constitution, no county may be created of less than 400 square miles, nor may any county smaller than this be further reduced in size.

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.

Warren County, Indiana

Warren County History, Geography, and Demographics

County Seat: Williamsport
Year Organized: 1827
Square Miles: 365
Court House:

125 N Monroe Street
County Courthouse
Williamsport, IN 47993-1162

Etymology - Origin of County Name

Named for Revolutionary War hero General Joseph Warren, who fell in the Battle of Bunker Hill.


County QuickFacts: Census Bureau Quick Facts

County History

The county was established March 1, 1827 by the Indiana General Assembly. It was named for Dr. Joseph Warren, killed in 1775 at the Battle of Bunker Hill, in which he fought as a private because his commission as a general had not yet taken effect. The short-lived town of Warrenton was the original Warren County seat, chosen by commissioners in March 1828. The next year, however, an act was passed calling for it to be relocated, and in June 1829 it was moved to Williamsport.

Williamsport was, from 1879 to 1896, the home of James Frank Hanly, who was the Governor of Indiana from 1905 to 1909.


According to the U.S. Census Bureau, the county has a total area of 367 square miles (949 kmē); 365 square miles (945 kmē) of it is land and 2 square miles (4 kmē) of it (0.47%) is water.

Neighboring Counties:

  • North: Benton County
  • East: Tippecanoe County
  • Southeast: Fountain County
  • South: Vermillion County
  • Southwest: Vermilion County, Ill.
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