Massachusetts's 12th congressional district

Massachusetts's twelfth congressional district is an obsolete district. It was eliminated in 1983 after the 1980 U.S. Census. Its last location was in southeastern Massachusetts and its last Congressman was Gerry Studds, who was redistricted into the tenth district.

Suffolk County: Boston Wards 13, 14, 15, 16, 17, 20, 24.

Boston (Wards 9, 10, 11, 12, 17, 18, 19, 20, 21).

Boston (Wards 6, 7, 8, 9, 11, 13, 14, 15, 16, 17).