Union County, Indiana

Union County
Union County Courthouse in Liberty
Location within the U.S. state of Indiana
Indiana's location within the U.S.
Coordinates: 39°37′N 84°55′W / 39.62°N 84.92°W / 39.62; -84.92
Country United States
State Indiana
FoundedJanuary 5, 1821 (created)
February 1, 1821 (organized)
SeatLiberty
Largest townLiberty
Area
  Total
165.18 sq mi (427.8 km2)
  Land161.22 sq mi (417.6 km2)
  Water3.95 sq mi (10.2 km2)  2.39%
Population
 (2020)
  Total
7,087
  Estimate 
(2023)
6,973
  Density43/sq mi (17/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district6th
Websitewww.unioncountyin.gov
Indiana county number 81

Union County is a county in the U.S. state of Indiana. As of the 2020 United States census, the population was 7,087. The county seat is Liberty. Since 2018, Union County has been included in the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area. It is located on the Indiana-Ohio border.