Marlboro, NJ Political Map | Democrat & Republican Areas in Marlboro

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

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

 

About 90% of adults in Marlboro typically vote, above the U.S. average of about 62%. Among adults in Marlboro, ~39% vote Democratic, ~51% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.

How Marlboro compares

Among cities within 25 miles, Marlboro leans more Republican than 118 of 184 neighbors.

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

Why Marlboro 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 Marlboro, not a ranked or complete list of what matters most.

Marlboro votes Republican even though it is densely developed (about 75%, modestly above the New Jersey average of 61%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 88% of households in Marlboro are family households, above 98% of cities. Marlboro runs against the grain of New Jersey, a Republican-leaning pocket in a Democratic-leaning state.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Marlboro, NJ sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Marlboro looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Marlboro 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 96% of households in Marlboro own their home, about 21 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Marlboro have completed high school, above 91% of cities. 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.