02066 leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.
About 95% of adults in 02066 typically vote, above the U.S. average of about 62%. Among adults in 02066, ~56% vote Democratic, ~39% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How 02066 compares
Among zip codes within 15 miles, 02066 leans more Democratic than 19 of 24 neighbors.
02066 runs about 6 points more Republican than Massachusetts as a whole.
Politics vary noticeably by block within 02066. The northeast side is the most Democratic-leaning (D+29) and the south side is the least Democratic-leaning (D+15), a spread of about 14 points.
Why 02066 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 02066, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 67% of adults in 02066 hold a bachelor's degree, about 39 points above the U.S. average of 28%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 02066, MA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 02066 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 02066 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 79%, about 19 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 88% of households in 02066 own their home, above 82% of zip codes. High high-school completion lines up with higher turnout, and about 98% of adults in 02066 have completed high school, above 93% 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.