Henderson leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 79% of adults in Henderson typically vote, above the U.S. average of about 62%. Among adults in Henderson, ~29% vote Democratic, ~50% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Henderson compares
Among cities within 25 miles, Henderson leans more Republican than 15 of 59 neighbors.
Henderson runs about 39 points more Republican than New York as a whole. New York leans Democratic overall, while Henderson is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Henderson. The southeast side is the most Republican-leaning (R+43) and the northwest side is the least Republican-leaning (R+23), a spread of about 19 points.
Why Henderson 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 Henderson, not a ranked or complete list of what matters most.
Henderson votes against the grain of New York. New York leans Democratic overall, while Henderson runs about 39 points more Republican. A high family-household share predicts Republican voting, and about 75% of households in Henderson are family households, above 77% of cities.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Henderson, NY sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Henderson looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Henderson 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 63%, above 61% of cities. High high-school completion lines up with higher turnout, and about 96% of adults in Henderson have completed high school, above 80% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Roberts Corner, NY R+23
- Henderson Harbor, NY R+24
- Rural Hill, NY R+34
- Belleville, NY R+39
- Woodville, NY R+46
- Thomas Settlement, NY R+36
- Smithville, NY R+30
- Taylor Settlement, NY R+37
- Ellisburg, NY R+44
- Adams, NY R+31
Cities with Similar Populations
- Chauncey, GA R+60
- Johnsontown, WV R+53
- Woodland Hills, KY Even
- Carr, NC R+5
- Indianola, OK R+70
- Bascom, FL R+50
- Hale, MO R+68
- Russell, NY R+43
- Mambrino, TX R+64
- Spencer, MI R+48
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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.