Liberty is a town in Center Township, Union County, Indiana, United States. The population was 2,061 at the 2000 census. It is the county seat of Union County.
Liberty is located at 39°38′9″N 84°55′44″W / 39.63583°N 84.92889°W / 39.63583; -84.92889 (39.635907, -84.928968).
According to the United States Census Bureau, the town has a total area of 0.9 square miles (2.3 km²), all of it land.