Green Harbor-Cedar Crest was a census-designated place (CDP) in the towns of Duxbury and Marshfield in Plymouth County, United States. It included the
community of Green Harbor. Cedar Crest was first listed as a CDP prior to the 2020 census. At the 2010 census, Cedar Crest and neighboring Green Harbor were part
with neighboring Cedar Crest in a single CDP. Green Harbor was originally known as "Green's Harbor". The name derives from William Green. The Pilgrim government
Marshfield, Marshfield Hills, Ocean Bluff-Brant Rock, and Cedar Crest, and shares the Green Harbor CDP with the town of Duxbury. Marshfield is located on
Massachusetts Marshfield, Massachusetts Duxbury, Massachusetts Green Harbor-Cedar Crest, Massachusetts Ocean Bluff-Brant Rock, Massachusetts North Pembroke