01778 leans heavily Democratic by roughly 40 points: about 70% of voters vote Democratic and 30% Republican.
About 88% of adults in 01778 typically vote, above the U.S. average of about 62%. Among adults in 01778, ~61% vote Democratic, ~26% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How 01778 compares
Among zip codes within 15 miles, 01778 leans more Democratic than 34 of 92 neighbors.
01778 runs about 15 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 01778. The south side is the most Democratic-leaning (D+46) and the northwest side is the least Democratic-leaning (D+30), a spread of about 16 points.
Why 01778 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 01778, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 79% of adults in 01778 hold a bachelor's degree, about 50 points above the U.S. average of 28%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 01778, MA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 01778 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 01778 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 80%, about 20 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 88% of households in 01778 own their home, above 82% of zip codes. High high-school completion lines up with higher turnout, and about 97% of adults in 01778 have completed high school, above 91% 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.