Rossville is a city in Walker County, Georgia, United States. The population was 3,980 at the 2020 census. It is part of the Chattanoog…Rossville is a city in Walker County, Georgia, United States. The population was 3,980 at the 2020 census. It is part of the Chattanooga, TN–GA Metropolitan Statistical Area. A post office has been in operation at Rossville since 1817. The city was named after Cherokee Indian Chief John Ross, who resided there until being forced to relocate with his people to Oklahoma on the Trail of Tears. The city incorporated in 1905.