08558 leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 93% of adults in 08558 typically vote, above the U.S. average of about 62%. Among adults in 08558, ~58% vote Democratic, ~34% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.
How 08558 compares
Among zip codes within 15 miles, 08558 leans more Democratic than 35 of 55 neighbors.
08558 runs about 21 points more Democratic than New Jersey as a whole.
Politics vary noticeably by block within 08558. The south side is the most Democratic-leaning (D+32) and the west side is the least Democratic-leaning (D+19), a spread of about 14 points.
Why 08558 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 08558, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 80% of adults in 08558 hold a bachelor's degree, about 52 points above the U.S. average of 28%.
Population density, never-married share, and Democratic lean
Places that combine high population density and a low never-married share tend to lean Democratic, as 08558, NJ does.
Why turnout in 08558 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 08558 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%. Homeowners vote more often than renters, and about 92% of households in 08558 own their home, compared to around 73% in nearby zip codes. High high-school completion lines up with higher turnout, and about 99% of adults in 08558 have completed high school, above 97% 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.