Swansea is a town in Bristol County in southeastern Massachusetts, United States.

Swansea is a part of the South Coast region of Massachusetts which encompasses the cities and towns that surround Buzzards Bay (excluding the Elizabeth Islands, Bourne and Falmouth), Mount Hope Bay and the Sakonnet River.

[3] Initially, the town established a committee to assign rank of 1, 2, or 3 to the residents with the first getting 3 acres of land, the second 2, and the third 1.

[4] On June 20, 1675, the first Native American attack of King Philip's War[3] had all 70 settlers confined to their stockade.

The plot it was on remains overgrown, free from construction, and a commemorative marker was placed there by the Commonwealth of Massachusetts in 1912.

What is now Barrington, Rhode Island (part of Massachusetts until 1747) was separated from the rest of Swansea in 1717, over religious differences.

[7] Swansea gained national attention in 1985 when Mark Hoyle, a young hemophiliac who had contracted AIDS through a blood transfusion, was allowed to attend public schools by Jack McCarthy, Superintendent of Schools.

[8] The case came to national attention around the same time as that of Ryan White in Indiana, and helped many children with HIV attend schools throughout the country.

The town is bordered by Dighton on the northeast, Somerset on the east, Mount Hope Bay on the south, Warren, Rhode Island, on the southwest, Barrington, Rhode Island, on the west, and Seekonk and Rehoboth to the north.

The town is part of the First Bristol and Plymouth state senatorial district, which includes the communities of Fall River, Freetown, Lakeville, Rochester, Somerset and Westport, currently Senator Michael Rodrigues (D-Westport) represents Swansea.

Swansea is patrolled by Troop D (Southeast District), 3rd (Dartmouth) Barracks of the Massachusetts State Police.

On the national level, the town is part of Massachusetts's 4th congressional district, which is represented by Jake Auchincloss.

Eastern Nazarene College previously offered Adult Studies/LEAD classes in Swansea, until they shuttered operations in 2025.

In addition, Exit 4 (Route 103) in Somerset provides quick access to the Ocean Grove neighborhood.

Swansea is the western terminus of the Southeastern Regional Transit Authority (SRTA) bus line.