01905 leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.
About 48% of adults in 01905 typically vote, below the U.S. average of about 62%. Among adults in 01905, ~29% vote Democratic, ~19% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 01905 compares
Among zip codes within 15 miles, 01905 leans more Democratic than 16 of 88 neighbors.
Politically, 01905 sits close to the rest of Massachusetts.
Politics vary noticeably by block within 01905. The east side is the most Democratic-leaning (D+32) and the northwest side is the least Democratic-leaning (D+15), a spread of about 17 points.
Why 01905 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 01905, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 96% of residents in 01905 live in densely developed areas, about 60 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 01905 have never been married, above 92% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 01905, 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 01905 looks the way it does
Renters vote less often than owners. About 49% of households in 01905 rent, about 24 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and 01905 sits in the bottom quarter on routine-care measures. High food insecurity lines up with lower turnout, and about 24% of adults in 01905 report food insecurity, above 88% 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.