Columbus, IN. Online Offers. Columbus ( /kÉlÊmbÉs/) 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.
In 1951, the U.S. Army Corps of Engineers began construction of the New Orleans Mississippi River Floodwall under the Dumaine Street Wharf. Between 1973 and 1992, 15 major sections were built at a cost of $30 million.
The Great Flood of 1937 decimated the town. The entire town was submerged beneath as much as 12 feet (3.7 m) of water in some areas for over three weeks during January and February. With almost all of the old town destroyed, Clarksville was rebuilt with a new modern city plan.