2026 results · Massachusetts · Massachusetts 3rd District
Lori Loureiro Trahan, the Democrat, wins re-election in Massachusetts's 3rd District
Kamala Harris carried the district by 18.9 points in 2024; this year's count is a 17.9-point move toward the Democrats.
| Candidate | Votes | Share | Share of the vote |
|---|---|---|---|
| Lori Loureiro TrahanDemocrat, incumbent | 173,326 | 67.2% | |
| Gary J. GrossiRepublican | 78,296 | 30.3% | |
| Dennis R. ConlonOther party | 6,442 | 2.5% |
Called by Call the Map, Nov 4, 10:46 AM EST · 96% counted.
About 96% of the expected vote counted258,064 votesCount last changed Nov 7, 1:08 PM EST · checked Nov 7, 5:03 PM ESTSource: the official state and county counts, gathered by civicAPI
The map
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About the seat
Massachusetts's 3rd District takes in all or part of 3 counties. The Democrats held it before this election. Its voters went D+18.9 for president in 2024. Its move from that vote, 17.9 points toward the Democrats, ranks 1 of 5 among the state's districts, counting from the largest move toward the Democrats.
- 2024 president
- D+18.9
- Move from 2024, rank in state
- 1 of 5
- Middlesex County61%
- Worcester County20%
- Essex County19%
Shares are of the votes counted this year. The district was redrawn for 2026 or had no contest in 2024, so no 2024 House race compares like for like.
What the count shows
Added together, the 3 counties compared moved 17.9 points toward the Democrats from the 2024 presidential vote.
The counties compared cast 72% as many votes as in 2024, from 75% in Middlesex County to 64% in Essex County.
Essex County moved most: D+11.7 for president in 2024, D+37.0 this year
The 3 counties with the largest moves from the 2024 presidential vote, among those with 2,000 or more votes for president in 2024 and a quarter of that counted. Each line runs from the 2024 margin to this year’s.
2024 president 2026
Middlesex County added 12,577 net votes for Trahan against the 2024 margin, 46% of the district's change
Across the 3 counties compared, the margin moved by 27,258 votes toward Trahan: this year’s lead in votes against the 2024 presidential lead in votes, county by county. The figure counts voters who changed sides and differences in who turned out alike; the count cannot tell them apart.
- Middlesex County+12,577 Trahan
- Essex County+9,405 Trahan
- Worcester County+5,276 Trahan
Massachusetts’s ballot
StatewideDemocrats won all 5 of Massachusetts's statewide races.
U.S. HouseBefore the election D 9–0, now D 9–0, counting the leaders in 3 uncalled seats
won leads, still counting changed party. Margins are the leader’s share minus the runner-up’s, in points.
Every count on this page is the official count, from the state and its counties. Counts are unofficial until the state certifies them. The 2024 comparison is the presidential vote, Kamala Harris against Donald Trump, on the same ground. Margins are the Democrat minus the Republican, in points of all votes.