02120 is a Democratic stronghold. About 81% of voters here vote Democratic and 19% Republican.
About 39% of adults in 02120 typically vote, below the U.S. average of about 62%. Among adults in 02120, ~32% vote Democratic, ~7% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 02120 compares
Among zip codes within 15 miles, 02120 leans more Democratic than 91 of 112 neighbors.
02120 runs about 37 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 02120. The south side is the most Democratic-leaning (D+72) and the north side is the least Democratic-leaning (D+53), a spread of about 18 points.
Why 02120 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 02120, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 02120 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 02120 sits in the top quarter (about 49%, above 88% of zip codes). A high never-married share predicts Democratic voting, and about 76% of adults in 02120 have never been married, in the top fraction of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 02120, 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 02120 looks the way it does
Renters vote less often than owners. About 90% of households in 02120 rent, about 65 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 27% of adults in 02120 report food insecurity, above 92% of zip codes. High-crime urban areas turn out at lower rates, and 02120 sits in the top 15% on a violent-crime measure. 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.