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. As of 2023, the population was estimated at 20,757. The county seat is Sullivan. Sullivan County is included in the Terre Haute, Indiana, metropolitan statistical area.
Country: United States
State: Indiana
Founded: January 15, 1817 (created) · February 1817 (organized)
Save
Share
More