Wellfleet is a town in Barnstable County, Massachusetts, United States. It is located halfway between the "tip" and "elbow" of Cape Cod. The town had a population of 2,750 at the 2010 census. The population grows to over six times the normal during the summer. Much of the town's land area is in wetlands protection. Nearly half of it is part of the Cape Cod National Seashore. Wellfleet is famous for its oysters, which are celebrated in the annual October Wellfleet OysterFest.