Massachusetts's congressional districts

Massachusetts is currently divided into 9 congressional districts, each represented by a member of the United States House of Representatives. After the 2010 census, the number of seats in Massachusetts was decreased from 10 to 9, due to the State's low growth in population since the year 2000. This mandatory redistricting after the 2010 census eliminated Massachusetts's 10th congressional district, as well as causing a major shift in how the state's congressional districts are currently drawn.

Current districts and representatives This is a list of United States representatives from Massachusetts in the 118th Congress, their terms, their district boundaries, and the district political ratings, according to the CPVI. The delegation has a total of nine members, all of whom are members of the Democratic party. It is the most populous state in which all members are from the same party.

Current U.S. representatives from Massachusetts District Member Party Incumbent since CPVI District map Richard Neal January 3, 1989 Jim McGovern January 3, 1997 Lori Trahan January 3, 2019 Jake Auchincloss January 3, 2021 Katherine Clark December 12, 2013 Seth Moulton January 3, 2015 Ayanna Pressley January 3, 2019 Stephen Lynch October 16, 2001 Bill Keating January 3, 2011

History of apportionment

Censusyear Residentpopulation Number ofrepresentatives Constituentsper representative(Massachusetts) Constituentsper representative(nationally) 1789 No census 8 N/A N/A 1790 378,787 14 27,056 30,000 1800 422,845 17 24,873 33,000 1810 472,040 20 23,602 35,000 1820 523,287 13 40,253 40,000 1830 610,408 12 50,867 47,700 1840 737,699 10 73,770 70,680 1850 994,514 11 90,410 93,425 1860 1,231,066 10 123,107 127,381 1870 1,457,351 11 132,486 131,425 1880 1,783,085 12 148,590 151,912 1890 2,238,947 13 172,227 173,901 1900 2,805,346 14 200,381 194,182 1910 3,366,416 16 210,401 212,407 1920 3,852,356 N/A N/A 1930 4,249,614 15 283,307 280,675 1940 4,316,721 14 308,337 301,164 1950 4,690,514 335,037 344,587 1960 5,148,578 12 429,048 410,481 1970 5,689,170 477,223 469,088 1980 5,737,093 11 521,549 519,235 1990 6,016,425 10 602,905 572,466 2000 6,349,097 635,557 646,952 2010 6,547,629 9 728,849 710,767

Source: U.S. Census Bureau.

Enumeration trends After the 1890 census, and starting with the 53rd United States Congress in 1893, Massachusetts's congressional districts were numbered west to east, with the in the west (Berkshire County) and the highest numbered district at Cape Cod. Before then, the district numeration was not as consistent; sometimes running east to west, other times going counter-clockwise around Boston.

Historical and present district boundaries Table of United States congressional district boundary maps in the State of Massachusetts, presented chronologically. All redistricting events that took place in Massachusetts between 1973 and 2013 are shown.

Year Statewide map Boston highlight 1973–1982 1983–1992 1993–2002 2003–2013 2013-2023 Since 2023

Massachusetts's congressional districts

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