Watertown Town is a Democratic stronghold. About 78% of voters here vote Democratic and 22% Republican.
About 69% of adults in Watertown Town typically vote, above the U.S. average of about 62%. Among adults in Watertown Town, ~54% vote Democratic, ~15% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Watertown Town compares
Among cities within 25 miles, Watertown Town leans more Democratic than 140 of 160 neighbors.
Watertown Town runs about 32 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by neighborhood within Watertown Town. The northeast side is the most Democratic-leaning (D+64) and the northwest side is the least Democratic-leaning (D+47), a spread of about 16 points.
Why Watertown Town 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 Watertown Town, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Watertown Town live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Watertown Town sits in the top quarter (about 67%, above 98% of cities). A high never-married share predicts Democratic voting, and about 38% of adults in Watertown Town have never been married, above 92% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Watertown Town, MA sits in the top tenth nationally on this measure.
Why turnout in Watertown Town looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Watertown Town 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 74%, about 14 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Watertown, MA D+77
- Belmont, MA D+63
- Newtonville, MA D+63
- Newton, MA D+58
- Brighton, MA D+61
- Allston, MA D+67
- Waltham, MA D+43
- Arlington, MA D+69
- Newton Center, MA D+60
- Chestnut Hill, MA D+60
Cities with Similar Populations
- North Ridgeville, OH R+13
- Seneca, SC R+44
- Clemmons, NC R+13
- Sylvania, OH Even
- Staunton, VA R+9
- Havertown, PA D+22
- San Luis, AZ D+5
- Huntington, NY D+8
- Harker Heights, TX Even
- Niles, MI R+15
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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.