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Your Ad Here Columbia County, Georgia Columbia County is a county located in the U.S. state of Georgia. The 2005 Census Estimate shows a population of 103,812. The county seat is Appling. History Columbia County was formed by an act of the Legislature of Georgia on December 10, 1790; it was formed from part of Richmond County (which was one of Georgia's original seven counties; St. Paul's Parish became Richmond County in 1777). ![]() |