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

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

Roselle is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.

 

About 53% of adults in Roselle typically vote, below the U.S. average of about 62%. Among adults in Roselle, ~42% vote Democratic, ~11% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.

How Roselle compares

Among cities within 25 miles, Roselle leans more Democratic than 246 of 255 neighbors.

Roselle runs about 52 points more Democratic than New Jersey as a whole.

Politics vary noticeably by neighborhood within Roselle. The southeast side is the most Democratic-leaning (D+70) and the northeast side is the least Democratic-leaning (D+46), a spread of about 25 points.

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

Dense areas vote Democratic. More than 99% of residents in Roselle live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in Roselle have never been married, above 96% of cities.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Roselle, NJ sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Roselle looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Roselle is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 41% of households in Roselle rent, about 16 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 23% of adults in Roselle report food insecurity, above 88% 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.