02301 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 51% of adults in 02301 typically vote, below the U.S. average of about 62%. Among adults in 02301, ~37% vote Democratic, ~14% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 02301 compares
Among zip codes within 15 miles, 02301 leans more Democratic than 44 of 51 neighbors.
02301 runs about 19 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 02301. The north side is the most Democratic-leaning (D+49) and the southwest side is the least Democratic-leaning (D+29), a spread of about 20 points.
Why 02301 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 02301, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 02301 live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 02301 have never been married, above 92% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 02301, MA sits in the top tenth 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 02301 looks the way it does
Renters vote less often than owners. About 49% of households in 02301 rent, about 24 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 28% of adults in 02301 report food insecurity, above 92% of zip codes. 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.