LaFayette is a city in, and the county seat of, Walker County, Georgia, United States. As of the 2020 census, the city population was 6,888. …LaFayette is a city in, and the county seat of, Walker County, Georgia, United States. As of the 2020 census, the city population was 6,888. It was founded as Chattooga. LaFayette is part of the Chattanooga, TN-GA Metropolitan Statistical Area.