Catoosa County is a county located in the northwestern part of the U.S. state of Georgia. As of the 2020 census, the population was 67,872. The county seat is Ringgold. The county was created on December 5, 1853. The meaning of the Cherokee language name "Catoosa" is obscure: "Catoosa" may come from the Cherokee words gatusi or gatu'gitse.

Ringgold is a city in and the county seat of Catoosa County, Georgia, United States. Its population was 3,414 at the 2020 census. It is part of the Chattanooga, Tennessee–GA Metropolitan Statistical Area.