AFC Croydon Athletic is a football club based in Thornton Heath in the London Borough of Croydon, England. The club are currently members of the Combined Counties League Premier Division South and play at the Mayfield Stadium. They are affiliated to the London Football Association.

Thornton Heath is a district of South London, England, within the London Borough of Croydon. It is around 1.5 miles (2.4 km) north of the town of Croydon, and 7.2 miles (11.6 km) south of Charing Cross. Prior to the creation of Greater London in 1965, Thornton Heath was in the County Borough of Croydon.