Norfolk County, MA Political Map | Democrat & Republican Areas in Norfolk County

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

Norfolk County leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.

 

About 77% of adults in Norfolk County typically vote, above the U.S. average of about 62%. Among adults in Norfolk County, ~50% vote Democratic, ~27% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.

How Norfolk County compares

Among counties within 50 miles, Norfolk County leans more Democratic than 8 of 10 neighbors.

Norfolk County runs about 5 points more Democratic than Massachusetts as a whole.

Politics vary noticeably by city within Norfolk County. The north side is the most Democratic-leaning (D+61) and the southwest side is the least Democratic-leaning (D+13), a spread of about 48 points.

Why Norfolk County leans the way it does

This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Norfolk County, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 60% of adults in Norfolk County hold a bachelor's degree, about 31 points above the U.S. average of 28%. Dense areas vote Democratic, and Norfolk County sits in the top fifth on density (about 76%, above 94% of counties). A high never-married share predicts Democratic voting, and about 33% of adults in Norfolk County have never been married, above 79% of counties.

Walkability and Democratic lean

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

Areas with strong routine healthcare access turn out at higher rates. Norfolk County 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 95% of adults in Norfolk County have completed high school, above 89% of counties. 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.