South Jefferson leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 75% of adults in South Jefferson typically vote, above the U.S. average of about 62%. Among adults in South Jefferson, ~33% vote Democratic, ~42% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How South Jefferson compares
Among cities within 25 miles, South Jefferson leans more Republican than 32 of 110 neighbors.
South Jefferson runs about 25 points more Republican than New York as a whole. New York leans Democratic overall, while South Jefferson is one of the few Republican-leaning pockets.
Why South Jefferson 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 South Jefferson, not a ranked or complete list of what matters most.
South Jefferson votes against the grain of New York. New York leans Democratic overall, while South Jefferson runs about 25 points more Republican.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as South Jefferson, NY does.
Why turnout in South Jefferson looks the way it does
Areas with strong routine healthcare access turn out at higher rates. South Jefferson 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 62%, above 56% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Stamford, NY R+17
- Hobart, NY Even
- Grand Gorge, NY R+12
- Jefferson, NY R+27
- Harpersfield, NY R+30
- North Blenheim, NY R+31
- North Harpersfield, NY R+29
- Roxbury, NY R+4
- South Kortright, NY R+14
- West Conesville, NY R+37
Cities with Similar Populations
- Winkumpaugh Corners, ME R+27
- Steenson Hollow, AL R+30
- Seneca, NM R+68
- Rumford, SD R+69
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.