1840s 1843: "The Counties of Barnstable, Dukes, and Nantucket, together with the towns of Rochester and Wareham, in the County of Plymouth, and of Dartmouth, Fairhaven, and New Bedford, in the County of Bristol."
1860s 1869: "Berkshire and Hampden counties." 1916: Boston, Wards 1, 2, 3, 4, 5, 6, 7, 8, 9, 11 (Precincts 1, 2). 1921: Boston, Wards 1, 2, 3, 4, 5, 6. 1934: Boston, Wards 4, 5, 9, 10, 11, 12, 19, 20, 21. 1941–1953: Boston, Wards 4, 5, 10, 12, 19, 20, 21; Brookline, Newton.
1960s–1970s 1963: "Bristol County: Cities of Attleboro, Fall River, and Taunton. Towns of Berkley, Dighton, Easton, Freetown, Mansfield, North Attleboro, Norton, Raynham, Rehoboth, Seekonk, Somerset, and Swansea. Middlesex County: City of Newton. Norfolk County: Towns of Dover, Foxborough, Medfield, Needham, Norfolk, Plainville, Walpole, Wellesley, Westwood, and Wrentham." 1977: "Bristol County: Cities of Attleboro, Fall River, and Taunton. Towns of Berkley, Dighton, Easton, Freetown, Mansfield, North Attleborough, Norton, Raynham, Rehoboth, Seekonk, Somerset, Swansea, and Westport. Middlesex County: Towns of Natick and Sherborn. Norfolk County: Towns of Foxborough, Medfield, Millis, Norfolk, Plainville, Sharon, Wellesley, and Wrentham. Plymouth County: Towns of Bridgewater, East Bridgewater, Halifax, Hanson, Lakeville, Middleborough, and West Bridgewater."
1990s 1997: "Counties: Barnstable, Dukes, Nantucket, Norfolk (part), and Plymouth (part)."
2003–2013 • All of
Barnstable County,
Dukes County,
Nantucket County, • The following municipalities in
Plymouth County:
Abington,
Carver,
Duxbury,
Hanover,
Hanson Pct. 2,
Hingham,
Hull,
Kingston,
Marshfield,
Norwell,
Pembroke,
Plymouth,
Plympton,
Rockland,
Scituate, and • The following municipalities in
Norfolk County:
Cohasset,
Quincy,
Weymouth == List of members representing the district ==