Berlin leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.
About 73% of adults in Berlin typically vote, above the U.S. average of about 62%. Among adults in Berlin, ~43% vote Democratic, ~30% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Berlin compares
Among cities within 25 miles, Berlin leans more Democratic than 90 of 152 neighbors.
Berlin runs about 7 points more Republican than Massachusetts as a whole.
Why Berlin 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 Berlin, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 50% of adults in Berlin hold a bachelor's degree, about 22 points above the U.S. average of 28%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Berlin, MA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Berlin looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Berlin 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Berlin have completed high school, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- West Berlin, MA D+16
- Clinton, MA D+12
- Hudson, MA D+15
- Bolton, MA D+28
- Northborough, MA D+24
- South Bolton, MA D+31
- Marlborough, MA D+21
- Lancaster, MA D+11
- Morningdale, MA D+14
- Boylston, MA D+11
Cities with Similar Populations
- Omega, GA R+59
- Black Hawk, CO D+15
- Harwich, MA D+23
- Brundidge, AL R+15
- Clayton, NY R+12
- Plympton, MA R+14
- East Dundee, IL D+6
- Byrdstown, TN R+69
- Catawissa, MO R+51
- New Buffalo, MI D+4
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.