West Islip, NY Political Map | Democrat & Republican Areas in West Islip

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

West Islip leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.

 

About 84% of adults in West Islip typically vote, above the U.S. average of about 62%. Among adults in West Islip, ~28% vote Democratic, ~56% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.

How West Islip compares

Among cities within 25 miles, West Islip leans more Republican than 197 of 211 neighbors.

West Islip runs about 47 points more Republican than New York as a whole. New York leans Democratic overall, while West Islip is one of the few Republican-leaning pockets.

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

West Islip votes Republican even though it is densely developed (about 97%, 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 80% of households in West Islip are family households, above 90% of cities. West Islip runs against the grain of New York, a Republican-leaning pocket in a Democratic-leaning state.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; West Islip, NY sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in West Islip looks the way it does

Areas with strong routine healthcare access turn out at higher rates. West Islip 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 72%, about 12 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 95% of households in West Islip own their home, about 20 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in West Islip have completed high school, above 81% 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 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.