10603 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 56% of adults in 10603 typically vote, below the U.S. average of about 62%. Among adults in 10603, ~38% vote Democratic, ~18% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How 10603 compares
Among zip codes within 15 miles, 10603 leans more Democratic than 49 of 76 neighbors.
10603 runs about 23 points more Democratic than New York as a whole.
Politics vary noticeably by block within 10603. The southwest side is the most Democratic-leaning (D+60) and the northeast side is the least Democratic-leaning (D+3), a spread of about 57 points.
Why 10603 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 10603, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 90% of residents in 10603 live in densely developed areas, about 54 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 10603 sits in the top quarter (about 45%, above 86% of zip codes). A high never-married share predicts Democratic voting, and about 34% of adults in 10603 have never been married, above 78% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 10603, NY sits in the top tenth nationally on this measure.
Why turnout in 10603 looks the way it does
Crowded housing lines up with lower turnout. About 6% of homes in 10603 have more than one occupant per room, above 90% of zip codes. Renters vote less often than owners, and about 36% of households in 10603 rent, above 82% of zip codes. Low high-school completion lines up with lower turnout, and about 86% of adults in 10603 have completed high school, below 77% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.