Belknap County leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% 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 85% of adults in Belknap County typically vote, above the U.S. average of about 62%. Among adults in Belknap County, ~39% vote Democratic, ~46% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Belknap County compares
Among counties within 50 miles, Belknap County leans more Republican than 7 of 8 neighbors.
Belknap County runs about 11 points more Republican than New Hampshire as a whole.
Politics vary noticeably by city within Belknap County. The north side runs the most Democratic (Even) and the south side runs the most Republican (R+25), a spread of about 27 points.
Why Belknap County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Belknap County. None of them point strongly toward either party.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Belknap County, NH does.
Why turnout in Belknap County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Belknap County 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 66%, about 6 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 81% of households in Belknap County own their home, above 82% of counties. High high-school completion lines up with higher turnout, and about 94% of adults in Belknap County have completed high school, above 82% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Merrimack County, NH D+6
- Carroll County, NH R+2
- Strafford County, NH D+4
- Grafton County, NH D+18
- York County, ME R+2
- Sullivan County, NH R+16
- Rockingham County, NH D+6
- Hillsborough County, NH D+11
- Windsor County, VT D+17
- Orange County, VT Even
Counties with Similar Populations
- Warrick County, IN R+33
- Georgetown County, SC R+17
- Pope County, AR R+47
- Lee County, NC R+18
- San Benito County, CA D+12
- Lamar County, MS R+40
- Isabella County, MI R+3
- Rutherford County, NC R+46
- Hamblen County, TN R+51
- Darlington County, SC R+8
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.