Hunterdon County leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 85% of adults in Hunterdon County typically vote, above the U.S. average of about 62%. Among adults in Hunterdon County, ~40% vote Democratic, ~45% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Hunterdon County compares
Among counties within 50 miles, Hunterdon County leans more Republican than 18 of 23 neighbors.
Hunterdon County runs about 11 points more Republican than New Jersey as a whole.
Politics vary noticeably by city within Hunterdon County. The southwest side runs the most Democratic (D+16) and the west side runs the most Republican (R+17), a spread of about 33 points.
Why Hunterdon County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Hunterdon County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 74% of households in Hunterdon County are family households, about 7 points above the U.S. average of 67%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Hunterdon County, NJ sits in the top tenth nationally on this measure.
Why turnout in Hunterdon County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Hunterdon 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 73%, about 13 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 86% of households in Hunterdon County own their home, compared to around 71% in nearby counties. High high-school completion lines up with higher turnout, and about 96% of adults in Hunterdon County have completed high school, above 96% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Warren County, NJ R+16
- Somerset County, NJ D+15
- Northampton County, PA Even
- Bucks County, PA Even
- Mercer County, NJ D+38
- Middlesex County, NJ D+11
- Morris County, NJ Even
- Union County, NJ D+26
- Lehigh County, PA D+6
- Montgomery County, PA D+21
Counties with Similar Populations
- Berkshire County, MA D+27
- Fayette County, PA R+36
- Bossier Parish, LA R+30
- Clarke County, GA D+35
- Linn County, OR R+25
- Wichita County, TX R+31
- Skagit County, WA D+4
- Sumter County, FL R+31
- Washington County, RI D+11
- Rapides Parish, LA R+24
Sources and methodology
Precinct-level voting records used to fit the model come from New Jersey Division of 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.