what county is columbus city in
Sponsored Topics. Columbus ( /kÉlÊmbÉs/) is a city in and the county seat of Bartholomew County, Indiana, United States. The population was 44,061 at the 2010 census, and the current mayor is Fred Armstrong. Located approximately 40 miles (64 km) south of Indianapolis, on the east fork of the White River, it is the state's 20th largest city.