Primary
Democratic Primary
Held September 1, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| Edward J. Markey ✓ | 572,146 | 64.9% | |
| Seth Moulton | 310,061 | 35.2% |
Republican Primary
Held September 1, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| John Deaton ✓ | 86,653 | 100.0% |
Nonpartisan Primary
Held September 1, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| Write-in | 665 | 0.8% |
Full calendar and every race: Massachusetts primary guide
Race Overview
General Election Polling Trend
Showing the published average. The rating above uses this figure.
The right edge is that same average of the last three polls. This is an average, not a forecast.
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Candidates
General Election Polling Average
Average is the unweighted mean of the last three scientific public polls. Fewer than three uses the polls that exist. The rating uses that average when the newest poll ended in the last 30 days. The table lists the polls in that average, plus the most recent 30 days or the newest 3 polls, whichever is more — subscribe for the full history. How accurate is each pollster? →
| Pollster | Date | Sample | MoE | Dem | Rep |
|---|---|---|---|---|---|
| MassINC Polling Group | 2026-09-22 | 800 LV | ±4.00 | Ed Markey 52.00% | John Deaton 26.00% |
| University of New Hampshire | 2026-09-21 | 564 LV | ±4.10 | Ed Markey 53.00% | John Deaton 30.00% |
| University of New Hampshire | 2026-08-24 | 881 LV | ±2.20 | Ed Markey 49.00% | John Deaton 30.00% |
Questions About This Race
Who is winning the 2026 Massachusetts Senate race?
Ed Markey leads John Deaton 51.3% to 28.7% in the PollingSource polling average — a D+22.6 margin based on 3 polls, the last three or fewer.
Is the 2026 Massachusetts Senate race competitive?
No — the PollingSource polling average rates it Safe D for Democrats.
What does the latest poll of the 2026 Massachusetts Senate race say?
The most recent public poll, from MassINC Polling Group (completed September 22, 2026), found Ed Markey (D) at 52% and John Deaton (R) at 26%.
When is the 2026 Massachusetts Senate race decided?
Election Day is Tuesday, November 3, 2026.
How is the PollingSource average calculated?
The PollingSource average is the unweighted mean of the last three scientific public polls, or fewer when fewer exist. One poll sets the rating when it ended in the last 30 days. We do not exclude pollsters. The table lists recent polls, including ones older than those three. Full details: pollingsource.com/methodology.
Race Notes
Long-tenured Senator
Independent Expenditures Updated 1 hour ago
Top Spenders
- ADVANCE PROGRESS Mixed $5,594,939
- COMMONWEALTH TOGETHER PAC GOP-aligned $2,222,370
- COMMONWEALTH PROSPERITY FUND GOP-aligned $230,000
- NRDC ACTION VOTES Dem-aligned $49,929
- NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE Dem-aligned $17,917
- GIVEGREEN UNITED ACTION Dem-aligned $80
- SIERRA CLUB INDEPENDENT ACTION Dem-aligned $10
Full outside-spending research — every committee, every race →
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