Manchester-By-The-Sea, MA Political Map | Democrat & Republican Areas in Manchester-By-The-Sea

By the BestNeighborhood data science team. Last updated May 2026.

Manchester-By-The-Sea leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.

 

About 80% of adults in Manchester-By-The-Sea typically vote, above the U.S. average of about 62%. Among adults in Manchester-By-The-Sea, ~54% vote Democratic, ~26% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.

How Manchester-By-The-Sea compares

Among cities within 25 miles, Manchester-By-The-Sea leans more Democratic than 63 of 84 neighbors.

Manchester-By-The-Sea runs about 11 points more Democratic than Massachusetts as a whole.

Why Manchester-By-The-Sea 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 Manchester-By-The-Sea, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 72% of adults in Manchester-By-The-Sea hold a bachelor's degree, about 44 points above the U.S. average of 28%. Dense areas vote Democratic, and Manchester-By-The-Sea sits in the top fifth on density (about 29%, above 80% of cities). A high never-married share predicts Democratic voting, and about 32% of adults in Manchester-By-The-Sea have never been married, above 81% of cities.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Manchester-By-The-Sea, MA 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 Manchester-By-The-Sea looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Manchester-By-The-Sea 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 82%, about 22 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Manchester-By-The-Sea have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.

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.