03237 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% 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 94% of adults in 03237 typically vote, above the U.S. average of about 62%. Among adults in 03237, ~39% vote Democratic, ~54% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How 03237 compares
Among zip codes within 15 miles, 03237 leans more Republican than 10 of 18 neighbors.
03237 runs about 18 points more Republican than New Hampshire as a whole. New Hampshire is roughly evenly split, and 03237 sits clearly on the Republican side.
Why 03237 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 03237, not a ranked or complete list of what matters most.
03237 votes against the grain of New Hampshire. New Hampshire is roughly evenly split, while 03237 runs about 18 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 03237, NH sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 03237 looks the way it does
Homeowners vote more often than renters. More than 99% of households in 03237 own their home, about 17 points above the New Hampshire average of 82%. High high-school completion lines up with higher turnout, and about 98% of adults in 03237 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 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.