With a Cook Partisan Voting Index rating of D+35, it is the most Democratic district in Massachusetts, a state with an all-Democratic congressional delegation.

[4] In 2019, Ayanna Pressley became the first female and person of color to represent the district as well as the Commonwealth of Massachusetts in Congress.

"[8] An act of the legislature passed April 22, 1852, divided the 7th district of Massachusetts as such: "The towns of Andover, Boxford, Bradford, Danvers, Haverhill, Lawrence, Lynnfield, Methuen, Middleton, Saugus, and Topsfield in the county of Essex; and the city of Charlestown, and the towns of Burlington, Lexington, Malden, Medford, Melrose, Reading, Somerville, South Reading, Stoneham, Waltham, and Woburn, in the county of Middlesex.

"[10] 1916: In Essex County: Boxford, Lawrence, Lynn, Lynnfield, Middleton, Nahant, North Andover, Peabody, Saugus.

[11][12] 1941: In Essex County: Lawrence, Lynn (part), Middleton, Nahant, North Andover, Peabody.