UPDATED Dec. 3, 2021, at 4:23 PM

What Redistricting Looks Like In Every State

An updating tracker of proposed congressional maps — and whether they might benefit Democrats or Republicans in the 2022 midterms and beyond. How this works »

The partisan breakdown of Massachusetts’s new map
partisan lean of districts:
Old map
9 districts
This map
9 districts
There are 9 Democratic-leaning seats in this proposed map.Change from old map: None.
The competitiveness and fairness of Massachusetts's maps
Median seat
Difference between the partisan lean of the state’s median district and the state as a whole.
Old mapR+4.4
New mapR+4.9
Efficiency gap
Difference between each party’s share of “wasted votes” — those that don’t contribute to a candidate winning.
Old mapD+15.8
New mapD+15.8
The number of districts in the state whose partisan leans are between R+5 and D+5.
Old map0/9
New map0/9
The demographic and partisan breakdown of Massachusetts’s new map
DistrictIncumbentPartisan leanRacial makeup
Richard E. NealD
James McGovernD
Lori TrahanD
Jake AuchinclossD
Katherine ClarkD
Seth MoultonD
Ayanna PressleyD
Stephen F. LynchD
William KeatingD

The racial makeup of each district is of the voting-age population.

The latest in Massachusetts

Nov. 23, 2021

After the Massachusetts state House and Senate both voted on Nov. 17 to approve a new map for the state’s nine congressional districts, Gov. Charlie Baker signed the state’s new congressional maps on Nov. 22. Unlike the last redistricting process, which, due to the state losing a congressional seat, was more dramatic, the changes here are fairly minor. If the map is approved, the state will continue to have nine solidly Democratic congressional districts and no Republican ones.

Of note is the fact that the map rejoins the city of Fall River, which had previously been split between two districts, but it does not place it in the same district as New Bedford — a move activists had sought because both have relatively high shares of immigrant and minority populations. Over the weekend, Secretary of the Commonwealth William Galvin criticized the map for dividing up communities and said Democrats are engaging in gerrymandering “this time out.”

Latest updates
Icon of the Massachusetts state boundaries
Nov. 17
The Massachusetts Legislature approved a congressional redistricting map, sending H.4256 to Governor Charlie Baker's desk.
Icon of the Massachusetts state boundaries
Nov. 3
The Massachusetts Special Joint Committee on Redistricting released proposed congressional redistricting maps.
Icon of the Massachusetts state boundaries
Nov. 1
Massachusetts Secretary of State Galvin published a memo that criticizes the state's new redistricting plans as impractical. Because the new plans split hundreds of voting precincts, "election administration [will be] nearly impossible in some instances." Galvin, a Democrat, predicted that "Congressional districts will only further complicate these issues" and publicly stated that the new state legislative maps are "a devastating blow to the voters of Massachusetts."

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Who controls redistricting in Massachusetts in 2021?
Democrats fully control the congressional redistricting process. New maps are drawn and passed by the Democratic state legislature and signed into law by the Republican governor (but legislative Democrats have the numbers to override a potential veto).