Chickamauga is a city in Walker County, Georgia, United States. The population was 2,917 at the 2020 census. It is part of the Chattanooga, TN–GA Metropolitan Statistical Area.

Walker County is a county located in the northwestern part of the U.S. state of Georgia. As of the 2020 census, the population was 67,654, down from 68,756 in 2010. The county seat is LaFayette. The county was created on December 18, 1833, from land formerly belonging to the Cherokee Indian Nation.