South Hamilton, MA Political Map | Democrat & Republican Areas in South Hamilton

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

South Hamilton leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 93% of adults in South Hamilton typically vote, above the U.S. average of about 62%. Among adults in South Hamilton, ~59% vote Democratic, ~34% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.

How South Hamilton compares

Among cities within 25 miles, South Hamilton leans more Democratic than 58 of 95 neighbors.

Politically, South Hamilton sits close to the rest of Massachusetts.

Politics vary noticeably by neighborhood within South Hamilton. The northeast side is the most Democratic-leaning (D+31) and the northwest side is the least Democratic-leaning (D+17), a spread of about 14 points.

Why South Hamilton 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 South Hamilton, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 69% of adults in South Hamilton hold a bachelor's degree, about 41 points above the U.S. average of 28%. Dense areas vote Democratic, and South Hamilton sits in the top fifth on density (about 43%, above 85% of cities).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; South Hamilton, 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 South Hamilton looks the way it does

Areas with strong routine healthcare access turn out at higher rates. South Hamilton 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 78%, about 18 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in South Hamilton 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.