Athens is a city in and the county seat of Limestone County, in the U.S. state of Alabama; it is included in the Huntsville-Decatur-Albertville, AL Combined Statistical Area. As of the 2020 census, the population of the city is 25,406.

Limestone County is a county of the U.S. state of Alabama. As of the 2020 census, the county's population was 103,570. Its county seat is Athens. The county is named after Limestone Creek. Limestone County is included in the Huntsville, AL Metropolitan Statistical Area.