Oneida County leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 67% of adults in Oneida County typically vote, near the U.S. average of about 62%. Among adults in Oneida County, ~29% vote Democratic, ~38% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Oneida County compares
Among counties within 50 miles, Oneida County leans more Republican than 2 of 6 neighbors.
Oneida County runs about 25 points more Republican than New York as a whole. New York leans Democratic overall, while Oneida County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Oneida County. The southeast side runs the most Democratic (D+10) and the northeast side runs the most Republican (R+38), a spread of about 49 points.
Why Oneida 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 Oneida County, not a ranked or complete list of what matters most.
Oneida County votes Republican even though it is densely developed (about 58%, well above the New York average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Oneida County runs against the grain of New York, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Oneida County, NY sits in the top tenth nationally on this measure.
Why turnout in Oneida County looks the way it does
Turnout in Oneida County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Herkimer County, NY R+29
- Madison County, NY R+13
- Onondaga County, NY D+21
- Otsego County, NY R+5
- Lewis County, NY R+48
- Chenango County, NY R+36
- Oswego County, NY R+23
- Fulton County, NY R+28
- Montgomery County, NY R+24
- Cortland County, NY R+17
Counties with Similar Populations
- Baldwin County, AL R+53
- Lake County, OH R+11
- Canyon County, ID R+40
- Smith County, TX R+28
- Brazos County, TX D+6
- Linn County, IA D+7
- Berkeley County, SC R+13
- Barnstable County, MA D+20
- Montgomery County, AL D+38
- Saratoga County, NY Even
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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.