Oneida County is a Republican stronghold. About 12% of voters here vote Democratic and 88% Republican.
About 70% of adults in Oneida County typically vote, above the U.S. average of about 62%. Among adults in Oneida County, ~8% vote Democratic, ~61% Republican, and ~31% 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 6 of 7 neighbors.
Oneida County runs about 40 points more Republican than Idaho as a whole.
Politics vary noticeably by city within Oneida County. The west side is the most Republican-leaning (R+84) and the east side is the least Republican-leaning (R+71), a spread of about 13 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.
Areas with many family households vote Republican. About 74% of households in Oneida County are family households, about 8 points above the U.S. average of 67%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Oneida County, ID sits in the top tenth nationally on this measure.
Why turnout in Oneida County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Oneida 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 66%, about 6 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 88% of households in Oneida County own their home, in the top fraction of counties. High high-school completion lines up with higher turnout, and about 96% of adults in Oneida County have completed high school, above 95% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Franklin County, ID R+77
- Cache County, UT R+32
- Box Elder County, UT R+56
- Caribou County, ID R+73
- Bannock County, ID R+25
- Power County, ID R+46
- Bear Lake County, ID R+71
- Rich County, UT R+66
- Weber County, UT R+21
- Bingham County, ID R+54
Counties with Similar Populations
- Florence County, WI R+41
- Morrill County, NE R+64
- Mineral County, NV R+40
- Cameron County, PA R+47
- Schley County, GA R+60
- Hyde County, NC R+25
- Mineral County, MT R+53
- Phillips County, CO R+53
- Hickman County, KY R+61
- Hot Springs County, WY R+57
All Local Stats
Home Services
Sources and methodology
Precinct-level voting records used to fit the model come from Idaho Secretary of State, 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.