07204 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 59% of adults in 07204 typically vote, near the U.S. average of about 62%. Among adults in 07204, ~31% vote Democratic, ~28% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 07204 compares
Among zip codes within 15 miles, 07204 leans more Democratic than 48 of 148 neighbors.
Politically, 07204 sits close to the rest of New Jersey.
Politics vary noticeably by block within 07204. The south side runs the most Democratic (D+14) and the north side runs the most Republican (Even), a spread of about 15 points.
Why 07204 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 07204, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 07204 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 07204 sits in the top quarter (about 40%, above 81% of zip codes). A high never-married share predicts Democratic voting, and about 37% of adults in 07204 have never been married, above 82% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 07204, NJ sits in the top tenth nationally on this measure.
Why turnout in 07204 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 07204 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 39% of households in 07204 rent, above 86% of zip codes. Crowded housing lines up with lower turnout, and about 5% of homes in 07204 have more than one occupant per room, above 86% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.