Wellesley Island leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 96% of adults in Wellesley Island typically vote, above the U.S. average of about 62%. Among adults in Wellesley Island, ~42% vote Democratic, ~54% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.
How Wellesley Island compares
Among cities within 25 miles, Wellesley Island leans more Republican than 4 of 51 neighbors.
Wellesley Island runs about 25 points more Republican than New York as a whole. New York leans Democratic overall, while Wellesley Island is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Wellesley Island. The southwest side runs the most Democratic (D+14) and the east side runs the most Republican (R+24), a spread of about 38 points.
Why Wellesley Island 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 Wellesley Island, not a ranked or complete list of what matters most.
Wellesley Island votes against the grain of New York. New York leans Democratic overall, while Wellesley Island runs about 25 points more Republican. Dense places usually vote Democratic, but Wellesley Island runs against that pattern.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Wellesley Island, NY sits in the top quarter 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 Wellesley Island looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Wellesley Island 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%. Homeowners vote more often than renters, and about 96% of households in Wellesley Island own their home, compared to around 79% in nearby cities. High high-school completion lines up with higher turnout, and more than 99% of adults in Wellesley Island have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Alexandria Bay, NY R+14
- Westminster Park, NY R+36
- Fishers Landing, NY R+35
- Plessis, NY R+36
- Redwood, NY R+34
- La Fargeville, NY R+46
- Clayton, NY R+12
- Omar, NY R+47
- Frontenac, NY R+32
Cities with Similar Populations
- Unadilla Forks, NY R+42
- Pumpkin Center, OK R+61
- Nelson, NY R+14
- Uchee, AL R+12
- Peakland, TN R+73
- Northfork, WV R+7
- Thompsontown, MD R+50
- Franktown, VA R+5
- Sipes Mill, PA R+74
- Bingham Lake, MN R+59
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.