New Jersey Political Map | Democrat & Republican Areas in New Jersey

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

New Jersey leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 68% of adults in New Jersey typically vote, above the U.S. average of about 62%. Among adults in New Jersey, ~37% vote Democratic, ~31% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.

How New Jersey compares

Among states within 500 miles, New Jersey leans more Democratic than 7 of 14 neighbors.

Politics vary noticeably by county within New Jersey. The west side runs the most Democratic (D+24) and the southeast side runs the most Republican (R+30), a spread of about 54 points.

Why New Jersey leans the way it does

This analysis examined 14,881 data points per state to find what predicts political lean and turnout. The items below are a few correlations that stood out for New Jersey, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 80% of residents in New Jersey live in densely developed areas, about 43 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and New Jersey sits in the top quarter (about 43%, above 92% of states). A high never-married share predicts Democratic voting, and about 35% of adults in New Jersey have never been married, above 78% of states.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; New Jersey sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in New Jersey looks the way it does

Areas with limited routine healthcare access turn out at lower rates. New Jersey is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.

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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.