Representatives Organizations Organizations Lori Trahan Democratic Lori Trahan Democratic The 3rd district is based in northeastern and central Massachusetts, and includes the cities of Lowell, Lawrence, and Haverhill.

[2] State officials State legislators Mayors Organizations Jake Auchincloss Democratic Jake Auchincloss Democratic The 4th congressional district is mostly in southern Massachusetts and includes Brookline, the southwestern suburbs of Boston, and northern Bristol County.

Representatives Organizations Seth Moulton Democratic Seth Moulton Democratic The 6th district is based in northeastern Massachusetts, and contains most of Essex County, including the North Shore and Cape Ann.

Senators Organizations Labor unions Notable Individuals Stephen Lynch Democratic Stephen Lynch Democratic The 8th district includes South Boston and the southern Boston metro area.

[2] Organizations Individuals Bill Keating Democratic Bill Keating Democratic The 9th district encompasses Cape Cod and the South Shore, and extends westward into New Bedford, part of Fall River, and surrounding suburbs.