Ocean Grove is a census-designated place (CDP) in the town of Swansea in Bristol County, Massachusetts, United States, on the north shore of Mount Hope Bay near the Cole River. The population was 2,811 at the 2010 census, and 2,904 as of the 2020 census.

Swansea is a town in Bristol County in southeastern Massachusetts. It is located at the mouth of the Taunton River, just west of Fall River, 47 miles (76 km) south of Boston, and 12 miles (19 km) southeast of Providence, Rhode Island. The population was 17,144 at the 2020 census. The villages of Hortonville, Barneyville and Ocean Grove are located in the town.