South Trenton, Trenton, NJ Political Map | Democrat & Republican Areas in South Trenton

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

South Trenton leans heavily Democratic by roughly 46 points: about 73% of voters vote Democratic and 27% Republican.

 

About 39% of adults in South Trenton typically vote, below the U.S. average of about 62%. Among adults in South Trenton, ~28% vote Democratic, ~11% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.

How South Trenton compares

Among neighborhoods within 5 miles, South Trenton leans more Democratic than 5 of 12 neighbors.

South Trenton runs about 40 points more Democratic than New Jersey as a whole.

Politics vary noticeably by block within South Trenton. The northwest side is the most Democratic-leaning (D+59) and the southeast side is the least Democratic-leaning (D+25), a spread of about 34 points.

Why South Trenton leans the way it does

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

Areas with many never-married adults vote Democratic. About 50% of adults in South Trenton have never been married, modestly above similar-sized neighborhoods (around 40%).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; South Trenton, Trenton, NJ sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in South Trenton looks the way it does

Areas with limited routine healthcare access turn out at lower rates. South Trenton is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 41%, about 26 points below the New Jersey average of 67%. High food insecurity lines up with lower turnout, and about 40% of adults in South Trenton report food insecurity, above 93% of neighborhoods. High-crime urban areas turn out at lower rates, and South Trenton sits in the top 15% on a violent-crime measure. 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.