Columbia County is a county located in the east central portion of the U.S. state of Georgia. As of the 2020 census, the population was 156,010. The legal county seat is Appling, but the de facto seat of county government is Evans.

A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equivalent term, shire town, is used in the U.S. state of Vermont and in several other English-speaking jurisdictions. County towns usually serve a similar function in Ireland, Jamaica, and the United Kingdom.