Afton is a town in Lincoln County, Wyoming, United States. The population was 2,172 at the 2020 census. Afton is home to the world's largest arch made of elk antlers. Spanning 75 feet (23 m) across the four lanes of U.S. Highway 89, the arch, completed in 1958, consists of 3,011 naturally shed elk antlers and weighs 15 tons.