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

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

South Amboy leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.

 

About 69% of adults in South Amboy typically vote, above the U.S. average of about 62%. Among adults in South Amboy, ~30% vote Democratic, ~39% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.

How South Amboy compares

Among cities within 25 miles, South Amboy leans more Republican than 167 of 212 neighbors.

South Amboy runs about 19 points more Republican than New Jersey as a whole. New Jersey leans Democratic overall, while South Amboy is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within South Amboy. The east side is the most Republican-leaning (R+23) and the northeast side is the least Republican-leaning (R+6), a spread of about 17 points.

Why South Amboy leans the way it does

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

South Amboy votes Republican even though it is densely developed (about 67%, modestly above the New Jersey average of 61%). State and regional patterns outweigh the Democratic lean that density usually predicts here. South Amboy runs against the grain of New Jersey, a Republican-leaning pocket in a Democratic-leaning state.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; South Amboy, NJ sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in South Amboy looks the way it does

Turnout in South Amboy sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.

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.