Bronx County leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 42% of adults in Bronx County typically vote, below the U.S. average of about 62%. Among adults in Bronx County, ~30% vote Democratic, ~12% Republican, and ~58% don't vote. The map below shows estimated turnout by block group.
How Bronx County compares
Among counties within 50 miles, Bronx County leans more Democratic than 18 of 20 neighbors.
Bronx County runs about 31 points more Democratic than New York as a whole.
Politics vary noticeably by city within Bronx County. The northeast side is the most Democratic-leaning (D+70) and the east side is the least Democratic-leaning (D+9), a spread of about 61 points.
Why Bronx County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Bronx County, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Bronx County 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 49% of adults in Bronx County have never been married, in the top fraction of counties.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Bronx County, NY sits in the top tenth nationally on this measure.
Why turnout in Bronx County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Bronx County 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 80% of households in Bronx County rent, compared to around 49% in nearby counties. High food insecurity lines up with lower turnout, and about 39% of adults in Bronx County report food insecurity, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- New York County, NY D+62
- Queens County, NY D+23
- Bergen County, NJ D+5
- Hudson County, NJ D+27
- Westchester County, NY D+27
- Kings County, NY D+34
- Passaic County, NJ D+4
- Nassau County, NY Even
- Essex County, NJ D+48
- Rockland County, NY R+14
Counties with Similar Populations
- Hillsborough County, FL Even
- Palm Beach County, FL D+5
- Suffolk County, NY R+8
- Orange County, FL D+14
- Nassau County, NY Even
- Sacramento County, CA D+20
- Philadelphia County, PA D+56
- Franklin County, OH D+30
- Middlesex County, MA D+37
- Travis County, TX D+37
Sources and methodology
Precinct-level voting records used to fit the model come from New York State Board 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.