Cotuit is one of the villages of the Town of Barnstable on Cape Cod in Barnstable County, Massachusetts, United States. Located on a peninsula on the south side of Barnstable about midway between Falmouth and Hyannis, Cotuit is bounded by the Santuit River to the west on the Mashpee town line, the villages of Marstons Mills to the north and Osterville to the east, and Nantucket Sound to the south.