Chatham is a town in Barnstable County, Massachusetts, United States, Barnstable County being coextensive with Cape Cod. The population was 6,625 at the 2000 census. Chatham is home to the Monomoy National Wildlife Refuge, located on Monomoy, and to Monomoy Theatre.
For geographic and demographic information on specific parts of the town of Chatham, please see the articles on Chatham (CDP) and West Chatham