Princeton Junction, NJ Political Map | Democrat & Republican Areas in Princeton Junction

By the BestNeighborhood data science team. Last updated May 2026.

Princeton Junction leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.

 

About 80% of adults in Princeton Junction typically vote, above the U.S. average of about 62%. Among adults in Princeton Junction, ~57% vote Democratic, ~23% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.

How Princeton Junction compares

Among cities within 25 miles, Princeton Junction leans more Democratic than 177 of 184 neighbors.

Princeton Junction runs about 36 points more Democratic than New Jersey as a whole.

Politics vary noticeably by neighborhood within Princeton Junction. The north side is the most Democratic-leaning (D+53) and the southwest side is the least Democratic-leaning (D+32), a spread of about 20 points.

Why Princeton Junction 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 Princeton Junction, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 84% of adults in Princeton Junction hold a bachelor's degree, about 55 points above the U.S. average of 28%. Dense areas vote Democratic, and Princeton Junction sits in the top fifth on density (about 63%, above 90% of cities).

Population density and Democratic lean

Places with high population density tend to lean Democratic; Princeton Junction, NJ sits in the top quarter nationally on this measure.

Why turnout in Princeton Junction looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Princeton Junction 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Princeton Junction have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.

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.