Sullivan County, Indiana

39°05′N 87°25′W / 39.09°N 87.41°W / 39.09; -87.41

Sullivan County
Sullivan County Courthouse
Sullivan County Courthouse
Map of Indiana highlighting Sullivan County
Location within the U.S. state of Indiana
Map of the United States highlighting Indiana
Indiana's location within the U.S.
Coordinates: 39°05′N 87°25′W / 39.09°N 87.41°W / 39.09; -87.41
Country United States
State Indiana
FoundedJanuary 15, 1817 (created)
February 1817 (organized)
Named forGeneral Daniel Sullivan
SeatSullivan
Largest citySullivan
Area
 • Total454.12 sq mi (1,176.2 km2)
 • Land447.14 sq mi (1,158.1 km2)
 • Water6.97 sq mi (18.1 km2)  1.53%
Population
 • Estimate 
(2021)
20,758
 • Density46.3/sq mi (17.9/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district8th
Websitewww.sullivancounty.in.gov
Indiana county number 77

Sullivan County is a county in the U.S. state of Indiana, and determined by the US Census Bureau to include the mean center of U.S. population in 1940.[1] As of 2020, the population was 20,758.[2] The county seat (and the county's only incorporated city) is Sullivan.[3]

Sullivan County is included in the Terre Haute, Indiana, metropolitan statistical area.

  1. ^ "Mean Center of Population for the United States: 1790 to 2000" (PDF). US Census Bureau. Archived from the original (PDF) on November 3, 2001. Retrieved September 17, 2011.
  2. ^ "Sullivan County QuickFacts". United States Census Bureau. Retrieved January 1, 2023.
  3. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.