02302 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 56% of adults in 02302 typically vote, below the U.S. average of about 62%. Among adults in 02302, ~39% vote Democratic, ~17% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How 02302 compares
Among zip codes within 15 miles, 02302 leans more Democratic than 45 of 54 neighbors.
02302 runs about 13 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 02302. The southwest side is the most Democratic-leaning (D+47) and the north side is the least Democratic-leaning (D+27), a spread of about 20 points.
Why 02302 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 02302, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 88% of residents in 02302 live in densely developed areas, about 52 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in 02302 have never been married, above 88% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 02302, MA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 02302 looks the way it does
Areas with high food insecurity turn out at lower rates. About 23% of adults in 02302 report food insecurity, about 7 points above the U.S. average of 16%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.