02721 is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 50% of adults in 02721 typically vote, below the U.S. average of about 62%. Among adults in 02721, ~25% vote Democratic, ~25% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How 02721 compares
Among zip codes within 15 miles, 02721 sits roughly in the middle of the political spectrum, with 22 neighbors leaning further in the place's direction and 18 leaning the other way.
02721 runs about 26 points more Republican than Massachusetts as a whole. Massachusetts leans Democratic overall, while 02721 sits closer to the political middle.
Politics vary noticeably by block within 02721. The north side runs the most Democratic (D+15) and the south side runs the most Republican (R+10), a spread of about 25 points.
Why 02721 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 02721, not a ranked or complete list of what matters most.
02721 votes against the grain of Massachusetts. Massachusetts leans Democratic overall, while 02721 runs about 26 points more Republican.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 02721, MA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 02721 looks the way it does
Renters vote less often than owners. About 63% of households in 02721 rent, about 38 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 24% of adults in 02721 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.