03215 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican. These figures are model estimates: New Hampshire did not have precinct-level voting records available for training, so the numbers above come from demographic and health features rather than local ground truth.
About 88% of adults in 03215 typically vote, above the U.S. average of about 62%. Among adults in 03215, ~56% vote Democratic, ~32% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 03215 compares
Among zip codes within 15 miles, 03215 leans more Democratic than 10 of 12 neighbors.
03215 runs about 24 points more Democratic than New Hampshire as a whole.
Why 03215 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 03215, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 51% of adults in 03215 hold a bachelor's degree, about 22 points above the U.S. average of 28%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 03215, NH sits above the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 03215 looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in 03215 have completed high school, about 7 points above the U.S. average of 90%. 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 New Hampshire Secretary of State, Elections Division, 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. NH did not have precinct-level voting records available for training, so the figures here come from extrapolation across demographic, health, and land-use features rather than local ground truth. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.