Windham is a town in Cumberland County, Maine, United States. The population was 18,434 at the 2020 census. It includes the villages of South Windham and North Windham. It is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area.

South Windham is a census-designated place (CDP) in the town of Windham in Cumberland County, Maine, United States. The population of the CDP was 1,374 at the 2010 census. Prior to 2010, South Windham was part of the Little Falls-South Windham census-designated place.