East Rocky Hill leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 74% of adults in East Rocky Hill typically vote, above the U.S. average of about 62%. Among adults in East Rocky Hill, ~43% vote Democratic, ~31% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How East Rocky Hill compares
Among cities within 25 miles, East Rocky Hill leans more Democratic than 149 of 202 neighbors.
East Rocky Hill runs about 10 points more Democratic than New Jersey as a whole.
Why East Rocky Hill leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for East Rocky Hill, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 67% of adults in East Rocky Hill hold a bachelor's degree, about 39 points above the U.S. average of 28%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; East Rocky Hill, NJ sits in the top tenth 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 East Rocky Hill looks the way it does
Areas with strong routine healthcare access turn out at higher rates. East Rocky Hill 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 94% of households in East Rocky Hill own their home, compared to around 74% in nearby cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Rocky Hill, NJ D+41
- Kingston, NJ D+15
- Griggstown, NJ D+25
- Heathcote, NJ D+32
- Kendall Park, NJ D+17
- Belle Mead, NJ D+25
- Pleasant Plains, NJ D+22
- Monmouth Junction, NJ D+23
- Franklin Park, NJ D+39
- Harlingen, NJ D+22
Cities with Similar Populations
- Abbot, ME R+44
- Kent Narrows, MD R+19
- Sorrento, ME R+11
- Payne, AR R+42
- Swords, LA R+18
- Cravat, IL R+64
- Pedlar Mills, VA R+48
- Passaconaway, NH D+18
- Imlaystown, NJ R+31
- Viewmonte, NY D+14
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.