Mashpee (/ˈmæʃpi/ Wampanoag: Mâseepee) is a town in Barnstable County, Massachusetts, United States, on Cape Cod. The population was 15,060 as of 2020. The town is the site of the headquarters and most members of the Mashpee Wampanoag Tribe, one of two federally recognized Wampanoag groups. For geographic and demographic information on specific parts of the town of Mashpee, please see the articles on Mashpee Neck, Monomoscoy Island, New Seabury, Popponesset, Popponesset Island, Seabrook, and Seconsett Island.