Seaford, NY Political Map | Democrat & Republican Areas in Seaford

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

Seaford leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.

 

About 84% of adults in Seaford typically vote, above the U.S. average of about 62%. Among adults in Seaford, ~27% vote Democratic, ~57% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.

How Seaford compares

Among cities within 25 miles, Seaford leans more Republican than 181 of 193 neighbors.

Seaford runs about 48 points more Republican than New York as a whole. New York leans Democratic overall, while Seaford is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within Seaford. The south side is the most Republican-leaning (R+43) and the east side is the least Republican-leaning (R+29), a spread of about 14 points.

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

Seaford votes Republican even though it is densely developed (about 98%, far above the New York average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 82% of households in Seaford are family households, above 94% of cities. Seaford runs against the grain of New York, a Republican-leaning pocket in a Democratic-leaning state.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Seaford, 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 Seaford looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Seaford 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 73%, about 13 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 94% of households in Seaford own their home, about 19 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Seaford have completed high school, above 90% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.