South Berwick is a true toss-up. About 50% of voters here vote Democratic and 50% Republican. These figures are model estimates: Maine did not have precinct-level voting records available for training, so the numbers above come from demographic and health features rather than local ground truth.
About 88% of adults in South Berwick typically vote, above the U.S. average of about 62%. Among adults in South Berwick, ~44% vote Democratic, ~44% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How South Berwick compares
Among cities within 25 miles, South Berwick sits roughly in the middle of the political spectrum, with 44 neighbors leaning further in the place's direction and 34 leaning the other way.
South Berwick runs about 7 points more Republican than Maine as a whole.
Politics vary noticeably by neighborhood within South Berwick. The west side runs the most Democratic (D+21) and the north side runs the most Republican (R+22), a spread of about 43 points.
Why South Berwick leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in South Berwick. None of them point strongly toward either party.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; South Berwick, ME sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in South Berwick looks the way it does
Areas with strong routine healthcare access turn out at higher rates. South Berwick 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in South Berwick have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Rollinsford, NH D+4
- Brixham, ME Even
- Somersworth, NH D+2
- Berwick, ME R+10
- Dover, NH D+22
- North Berwick, ME R+19
- Eliot, ME Even
- York, ME D+15
- Tatnic, ME R+23
- Cape Neddick, ME D+7
Cities with Similar Populations
- Pascoag, RI R+16
- Fort Knox, KY R+13
- Jefferson Manor, VA D+50
- Orange City, IA R+41
- Pratt, KS R+50
- Mohave Valley, AZ R+44
- Belle Fourche, SD R+56
- Lula, GA R+73
- Almont, MI R+39
- Venice Gardens, FL R+21
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Maine Secretary of State, Bureau of Corporations Elections and Commissions, 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. ME did not have precinct-level voting records available for training, so the figures here come from extrapolation across demographic, health, and land-use features rather than local ground truth. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.