East Setauket is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 86% of adults in East Setauket typically vote, above the U.S. average of about 62%. Among adults in East Setauket, ~42% vote Democratic, ~44% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How East Setauket compares
Among cities within 25 miles, East Setauket sits roughly in the middle of the political spectrum, with 33 neighbors leaning further in the place's direction and 96 leaning the other way.
East Setauket runs about 15 points more Republican than New York as a whole. New York leans Democratic overall, while East Setauket sits closer to the political middle.
Politics vary noticeably by neighborhood within East Setauket. The north side runs the most Democratic (D+25) and the east side runs the most Republican (R+21), a spread of about 46 points.
Why East Setauket 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 East Setauket, not a ranked or complete list of what matters most.
East Setauket votes against the grain of New York. New York leans Democratic overall, while East Setauket runs about 15 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; East Setauket, NY sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in East Setauket looks the way it does
Areas with strong routine healthcare access turn out at higher rates. East Setauket 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%. High high-school completion lines up with higher turnout, and about 97% of adults in East Setauket have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Setauket-East Setauket, NY D+3
- Stony Brook University, NY D+35
- Stony Brook, NY D+23
- Poquott, NY D+11
- Port Jefferson, NY D+11
- Old Field, NY D+5
- Belle Terre, NY R+4
- Port Jefferson Station, NY R+15
- Terryville, NY R+21
- Head of the Harbor, NY R+16
Cities with Similar Populations
- Union Springs, NY R+13
- Wagon Wheel, AZ R+32
- Springridge, LA R+62
- New Church, VA Even
- Lacona, NY R+36
- Laotto, IN R+55
- Corapeake, NC R+41
- Harpersville, AL R+61
- Cabin John, MD D+62
- Kings Mills, OH R+24
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.