Massachusetts / MA-03
Massachusetts District 3
Score
Irregularity score 41 Middle of the packLess compact than 40% of other congressional districts.
256th least compact of 429 nationally, 6th of 9 in Massachusetts.
A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work
The three measures
- Polsby-Popper
- 0.23at least as compact as 43% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.57at least as compact as 73% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.81at least as compact as 60% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.
Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.
The state's edge
30% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge
Cities and towns
The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.
- Lowell cityall 115,554 residents
- Lawrence cityall 89,143 residents
- Haverhill cityall 67,787 residents
- Methuen Town cityall 53,059 residents
- Fitchburg cityall 41,946 residents
- Marlborough cityall 41,793 residents
- Gardner cityall 21,287 residents
- Hudson communityall 15,749 residents
- Clinton communityall 8,166 residents
- West Concord communityall 6,320 residents
And 12 smaller places. 38% of this district's people live outside any city, town or named community. How places are counted
ZIP codes
51 ZIP codes have residents in this district. 10 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.
Show all 51 ZIP codes
- 01420 (99%)
- 01430
- 01431
- 01432
- 01434
- 01440 (99%)
- 01450
- 01451
- 01460
- 01462
- 01463
- 01464
- 01469
- 01473 (92%)
- 01474
- 01475
- 01503
- 01510
- 01523
- 01561
- 01718
- 01719
- 01720
- 01740
- 01741
- 01742
- 01749
- 01752
- 01773 (1%)
- 01775 (99%)
- 01821 (41%)
- 01824
- 01826
- 01827
- 01830
- 01832
- 01835
- 01840
- 01841
- 01843
- 01844
- 01845 (1%)
- 01850
- 01851
- 01852 (99%)
- 01854
- 01862 (98%)
- 01863
- 01876 (1%)
- 01879
- 01886
These are the Census Bureau's ZIP code areas, which match residential ZIP codes closely. ZIP codes used only for PO boxes or a single organization aren't included. How ZIP codes are matched
2024 presidential vote
Shares of the votes for the two of them; other candidates are left out. Massachusetts used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from
U.S. House
Statewide results from Massachusetts for the November 3, 2026 election aren't available yet.
Massachusetts's senators
- Edward J. Markey, DemocratSeat on the November 3, 2026 ballot: results aren't available yet.
- Elizabeth Warren, Democrat
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Where it sits in Massachusetts
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
Spot a problem with this district? Email us about MA-03.