Oswego County leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 65% of adults in Oswego County typically vote, near the U.S. average of about 62%. Among adults in Oswego County, ~26% vote Democratic, ~40% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Oswego County compares
Among counties within 50 miles, Oswego County leans more Republican than 5 of 6 neighbors.
Oswego County runs about 35 points more Republican than New York as a whole. New York leans Democratic overall, while Oswego County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Oswego County. The east side is the most split-leaning (R+45) and the west side is the least split-leaning (Even), a spread of about 44 points.
Why Oswego County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Oswego County, not a ranked or complete list of what matters most.
Oswego County votes against the grain of New York. New York leans Democratic overall, while Oswego County runs about 35 points more Republican.
Uninsured rate and voter turnout
Places with a low uninsured rate tend to turn out at a higher rate; Oswego County, NY sits in the bottom tenth nationally on this measure. Insurance coverage does not directly drive turnout; it reflects the income and stability that line up with who votes.
Why turnout in Oswego County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Oswego County 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 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Onondaga County, NY D+21
- Cayuga County, NY R+17
- Madison County, NY R+13
- Wayne County, NY R+23
- Seneca County, NY R+18
- Jefferson County, NY R+19
- Oneida County, NY R+13
- Lewis County, NY R+48
- Cortland County, NY R+17
- Ontario County, NY R+2
Counties with Similar Populations
- Wayne County, NC R+7
- Missoula County, MT D+16
- Sheboygan County, WI R+15
- Wayne County, OH R+42
- Lowndes County, GA Even
- Jefferson County, NY R+19
- Robeson County, NC R+13
- Potter County, TX R+19
- Calhoun County, AL R+35
- Henderson County, NC R+16
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.