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

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

Rockleigh leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.

 

About 51% of adults in Rockleigh typically vote, below the U.S. average of about 62%. Among adults in Rockleigh, ~23% vote Democratic, ~28% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.

How Rockleigh compares

Among cities within 25 miles, Rockleigh leans more Republican than 231 of 303 neighbors.

Rockleigh runs about 16 points more Republican than New Jersey as a whole. New Jersey leans Democratic overall, while Rockleigh is one of the few Republican-leaning pockets.

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

Rockleigh votes Republican even though it is densely developed (about 80%, well above the New Jersey average of 61%). Here an older population outweighs the Democratic lean that density usually predicts. A high family-household share predicts Republican voting, and about 78% of households in Rockleigh are family households, above 86% of cities. Rockleigh runs against the grain of New Jersey, a Republican-leaning pocket in a Democratic-leaning state.

High-school completion, developed land, and voter turnout

Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Rockleigh, NJ does.

Why turnout in Rockleigh looks the way it does

Renters vote less often than owners. About 38% of households in Rockleigh rent, about 13 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Rockleigh sits in the top quarter on routine-care measures. Crowded housing lines up with lower turnout, and about 7% of homes in Rockleigh have more than one occupant per room, above 92% of cities. 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.