2013–

Boston (Wards 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22), Cambridge (Wards 1, 2, 3, 4, 5, 10, 11), Chelsea, Somerville had formerly belonged to the 8th district. Everett, Milton (Precincts 1, 5, 10), and Randolph were added to comprise the new 7th district in 2013.

2003-2012

Boston (Wards 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22), Cambridge, Chelsea, Somerville comprised the 8th district. After redistricting, this area was known as the 7th district beginning in 2013.

1993-2002

Belmont, Boston (Wards 1, 2, 4, 5, 9, 10, 11, 12, 14, 15, 17, 18, 21, 22), Cambridge, Chelsea, Somerville, Watertown comprised the 8th district.

1983-1992

Arlington, Belmont, Boston (Wards 1, 2, 4, 5, 21, 22), Cambridge, Somerville, Waltham, Watertown comprised the 8th district.

1973-1982

Arlington, Belmont, Boston (Wards 1, 2, 5, 21, 22), Cambridge, Somerville, Watertown comprised the 8th district.

1963-1972

Boston (Wards 1, 2, 3, 21, 22), Brookline, Cambridge, Somerville comprised the 8th district.

1943-1962

Everett, Lynnfield, Malden, Medford, Melrose, N. Reading, Reading, Saugus, Somerville (Wards 4, 5, 6, 7), Stoneham, Wakefield comprised the 8th district.

Boston (Wards 1, 2, 3, 22), Cambridge, Somerville (Wards 1, 2, 3) were in the 11th District

1933-1942

Cambridge (Wards 2, 3), Everett, Malden, Medford, Somerville comprised the 8th district.

Boston (Ward 22), Brookline, Cambridge (Wards 4, 5, 6, 7, 8, 9, 10), Lincoln, Newton, Waltham, Watertown, Wellesley, Weston were in the 9th District

Boston (Wards 1, 2, 3, 8), Cambridge (Ward 1), and Chelsea were in the 11th District

1913-1932

Arlington, Belmont, Cambridge, Lexington, Medford, Melrose, Stoneham, Wakefield, Watertown, Winchester comprised the 8th district.

Chelsea, Everett, Malden, Revere, Somerville, Winthrop were in the 9th District

Boston (Wards 1, 2, 3, 4, 5, 6) were in the 10th District

1903-1912

Arlington, Belmont, Cambridge, Medford, Somerville, Winchester, Woburn comprised the 8th district.

Boston (Wards 1, 2, 3, 4, 5, 6, 7, 8, 9, 12), and Winthrop were in the 9th District

1893-1902

Arlington, Boston (Wards 9, 10, 11), Cambridge, Medford, Somerville comprised the 8th district.

Boston (Wards 1, 2, 3, 6, 7, 8, 12, 16, 17, 18, 19), and Winthrop were in the 9th District

1883-1892

Boston wards 1, 2, 6, 7, 13, 14, 15, 16 were in the 4th District

Arlington, Belmont, Boston (Wards 8, 9, 10, 25), Burlington, Cambridge, Lexington, Somerville, Waltham, Watertown and Woburn were in the 5th District

1873-1882

Brighton, Brookline, Cambridge, Framingham, Holliston, Hopkinton, Natick, Sherburn, Watertown, Wayland, West Roxbury, Weston comprised the 8th district.

Boston (Wards 1, 2, 6, 7, 8, 9, 10, 11, 12), Chelsea, Revere and Winthrop were in the 4th District

Arlington, Belmont, Burlington, Charlestown, Everett, Lexington, Malden, Medford, Melrose, Somerville, Stoneham, Wakefield, Waltham, Winchester and Woburn were in the 5th District

1863-1872

Boston (Wards 1, 2, 3, 4, 6, 9), Cambridge, Chelsea and Winthrop were in the 4th District

Charlestown, Belmont, Billerica, Burlington, Lexington, Malden, Medford, Melrose, N. Reading, Reading, Somerville, S. Reading, Stoneham, Tewksbury, Waltham, Wilmington, Winchester, Woburn and W. Cambridge were in the 6th District

1853-1862

Boston (Wards 1, 2, 3, 4, 5, 6), Cambridge, Chelsea and Winthrop were in the 5th District

Charlestown, Burlington, Lexington, Malden, Medford, Melrose, Reading, Somerville, S. Reading, Stoneham, Waltham, W. Cambridge, Wilmington, Winchester and Woburn were in the 7th District

1823-1852

The Boston area composed the 1st District

All of Middlesex County composed the 4th District