02111 is a Democratic stronghold. About 76% of voters here vote Democratic and 24% Republican.
About 43% of adults in 02111 typically vote, below the U.S. average of about 62%. Among adults in 02111, ~33% vote Democratic, ~10% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 02111 compares
Among zip codes within 15 miles, 02111 leans more Democratic than 62 of 110 neighbors.
02111 runs about 28 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 02111. The northeast side is the most Democratic-leaning (D+66) and the southwest side is the least Democratic-leaning (D+50), a spread of about 16 points.
Why 02111 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 02111, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 02111 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 02111 sits in the top quarter (about 61%, above 94% of zip codes). A high never-married share predicts Democratic voting, and about 51% of adults in 02111 have never been married, above 95% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 02111, MA sits in the top tenth nationally on this measure.
Why turnout in 02111 looks the way it does
Renters vote less often than owners. About 73% of households in 02111 rent, about 48 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 7% of homes in 02111 have more than one occupant per room, above 91% of zip codes. Low high-school completion lines up with lower turnout, and about 85% of adults in 02111 have completed high school, below 80% 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.