Westchester County, NY Political Map | Democrat & Republican Areas in Westchester County

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

Westchester County leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 67% of adults in Westchester County typically vote, near the U.S. average of about 62%. Among adults in Westchester County, ~42% vote Democratic, ~25% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.

How Westchester County compares

Among counties within 50 miles, Westchester County leans more Democratic than 14 of 19 neighbors.

Westchester County runs about 14 points more Democratic than New York as a whole.

Politics vary noticeably by city within Westchester County. The south side is the most Democratic-leaning (D+39) and the north side is the least Democratic-leaning (Even), a spread of about 38 points.

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

Dense areas vote Democratic. About 85% of residents in Westchester County live in densely developed areas, about 48 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Westchester County sits in the top quarter (about 53%, above 98% of counties). A high never-married share predicts Democratic voting, and about 34% of adults in Westchester County have never been married, above 80% of counties.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Westchester County, NY sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in Westchester County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Westchester County 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 68%, about 8 points above the U.S. average of 60%. 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 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.