Harwich Port is a small affluent seaside community and census-designated place (CDP) situated along the Nantucket Sound in the town of Harwich in Barnstable County, Massachusetts, United States. It is named after the port of Harwich in Essex, England. As of the 2010 census, the CDP had a population of 1,644. It is a popular vacation spot on Cape Cod and is home to the Wychmere Beach Club and the Allen Harbor Yacht Club. Also, one of its popular mottos is "Three Harbors, One Port," referencing to Saquatucket, Wychmere, and Allen Harbor, which are all located in Harwich Port. Well known residents include Bill O'Brien, former head coach and general manager of the Houston Texans.

Harwich is a New England town on Cape Cod, in Barnstable County in the state of Massachusetts in the United States. At the 2020 census it had a population of 13,440. Harwich experiences a seasonal increase to roughly 37,000. The town is a popular vacation spot, located near the Cape Cod National Seashore. Harwich's beaches are on the Nantucket Sound side of Cape Cod. Harwich has three active harbors. Saquatucket, Wychmere and Allen Harbors are all in Harwich Port. The town of Harwich includes the villages of Pleasant Lake, West Harwich, East Harwich, Harwich Port, Harwich Center, North Harwich and South Harwich.