electionsmcp › races › Massachusetts's 9th Congressional District
Massachusetts's 9th Congressional District
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how Massachusetts actually voted.
Model Massachusetts's 9th Congressional District →
Current officeholder
William R. Keating Democratic
2024 result
Democratic D+13.0
2024 votes cast
445,753
Office
U.S. House
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model Massachusetts's 9th Congressional District in five steps
- Set the candidates. Name the contenders for the Massachusetts's 9th Congressional District (or keep the generic Democrat / Republican defaults). The map starts from real 2024 results in every precinct.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Drill to precincts. Zoom from the state down to individual precincts and override any of them by hand.
- Roll up & share. Roll the result up to chamber control, then publish a shareable, frozen link to your scenario.
Open Massachusetts's 9th Congressional District in the simulator →
Frequently asked
Who represents Massachusetts's 9th Congressional District?
William R. Keating (Democratic) currently holds this U.S. House seat.
What was the 2024 result in Massachusetts's 9th Congressional District?
D+13.0 — 251,931 Democratic, 193,822 Republican, of 445,753 votes cast.
Can I model this race myself?
Yes — open it in the electionsmcp simulator and model vote-share swing and turnout from the real 2024 baseline, down to the precinct, then roll it up to chamber control.