Princeton leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 94% of adults in Princeton typically vote, above the U.S. average of about 62%. Among adults in Princeton, ~53% vote Democratic, ~40% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How Princeton compares
Among cities within 25 miles, Princeton leans more Democratic than 92 of 126 neighbors.
Princeton runs about 11 points more Republican than Massachusetts as a whole.
Why Princeton leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Princeton, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 59% of adults in Princeton hold a bachelor's degree, about 31 points above the U.S. average of 28%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Princeton, MA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Princeton looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Princeton is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 78%, about 18 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 94% of households in Princeton own their home, about 19 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Princeton have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- West Sterling, MA D+10
- Leino Park, MA Even
- Jefferson, MA D+10
- Sterling, MA D+3
- Rutland, MA R+8
- Princeton Station, MA R+14
- Hubbardston, MA R+13
- Westminster, MA Even
- West Boylston, MA D+13
- Sandy Beach, MA D+4
Cities with Similar Populations
- McAlisterville, PA R+66
- Sumner, IA R+33
- Andover, OH R+52
- Port Murray, NJ R+22
- Astatula, FL R+51
- Corbett, OR R+3
- Paden City, WV R+55
- Hamilton, IN R+52
- Wadesville, IN R+52
- Vincent, AL R+52
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Massachusetts Secretary of the Commonwealth, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.