Surfside leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 70% of adults in Surfside typically vote, above the U.S. average of about 62%. Among adults in Surfside, ~45% vote Democratic, ~25% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Surfside compares
Among cities within 25 miles, Surfside leans more Democratic than 1 of 7 neighbors.
Politically, Surfside sits close to the rest of Massachusetts.
Why Surfside 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 Surfside, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 63% of adults in Surfside hold a bachelor's degree, about 34 points above the U.S. average of 28%. Dense areas vote Democratic, and Surfside sits in the top fifth on density (about 34%, above 82% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Surfside, MA sits in the top tenth 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 Surfside looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Surfside 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 72%, about 12 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Nantucket, MA D+22
- Siasconset, MA D+28
- Katama, MA D+32
- Edgartown, MA D+33
- Oak Bluffs, MA D+38
- Hyannis Port, MA D+12
- Dennis Port, MA D+17
Cities with Similar Populations
- Huron, MO R+65
- Clay Springs, AZ R+63
- Summit Lake, WI R+39
- Folsomdale, NY R+50
- Brisbin, PA R+61
- Quincy, MO R+68
- Botha, VA R+33
- Oak Valley, TX R+56
- Edwardsville, AL R+77
- Wall, PA R+3
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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.