08204 leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 87% of adults in 08204 typically vote, above the U.S. average of about 62%. Among adults in 08204, ~38% vote Democratic, ~50% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 08204 compares
Among zip codes within 15 miles, 08204 leans more Republican than 3 of 7 neighbors.
08204 runs about 20 points more Republican than New Jersey as a whole. New Jersey leans Democratic overall, while 08204 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 08204. The southwest side runs the most Democratic (D+10) and the northeast side runs the most Republican (R+27), a spread of about 37 points.
Why 08204 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 08204, not a ranked or complete list of what matters most.
08204 votes against the grain of New Jersey. New Jersey leans Democratic overall, while 08204 runs about 20 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 08204, NJ sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 08204 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 08204 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 68%, about 8 points above the U.S. average of 60%. 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.