02122 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 49% of adults in 02122 typically vote, below the U.S. average of about 62%. Among adults in 02122, ~36% vote Democratic, ~13% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How 02122 compares
Among zip codes within 15 miles, 02122 leans more Democratic than 52 of 111 neighbors.
02122 runs about 24 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 02122. The west side is the most Democratic-leaning (D+55) and the southeast side is the least Democratic-leaning (D+38), a spread of about 17 points.
Why 02122 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 02122, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 02122 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 02122 sits in the top quarter (about 37%, above 77% of zip codes). A high never-married share predicts Democratic voting, and about 48% of adults in 02122 have never been married, above 94% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 02122, 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 02122 looks the way it does
Renters vote less often than owners. About 56% of households in 02122 rent, about 31 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 25% of adults in 02122 report food insecurity, above 89% of zip codes. High-crime urban areas turn out at lower rates, and 02122 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.