01351 leans heavily Democratic by roughly 40 points: about 70% of voters vote Democratic and 30% Republican.
About 75% of adults in 01351 typically vote, above the U.S. average of about 62%. Among adults in 01351, ~52% vote Democratic, ~23% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How 01351 compares
Among zip codes within 15 miles, 01351 leans more Democratic than 22 of 32 neighbors.
01351 runs about 16 points more Democratic than Massachusetts as a whole.
Politics vary noticeably by block within 01351. The southeast side is the most Democratic-leaning (D+48) and the north side is the least Democratic-leaning (D+31), a spread of about 16 points.
Why 01351 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 01351, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 51% of adults in 01351 hold a bachelor's degree, about 23 points above the U.S. average of 28%.
Cholesterol-screening access and voter turnout
Places with high cholesterol-screening access tend to turn out at a higher rate; 01351, MA sits in the top tenth nationally on this measure. Cholesterol screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 01351 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 01351 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 71%, about 11 points above the U.S. average of 60%. 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.