Caribou County is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.
About 62% of adults in Caribou County typically vote, near the U.S. average of about 62%. Among adults in Caribou County, ~8% vote Democratic, ~54% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Caribou County compares
Among counties within 50 miles, Caribou County leans more Republican than 3 of 5 neighbors.
Caribou County runs about 37 points more Republican than Idaho as a whole.
Why Caribou 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 Caribou County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Caribou County, about 91% of residents are non-Hispanic white, about 18 points above the U.S. average of 72%; about 17% of adults hold a bachelor's degree, about 9 points below the Idaho average of 26%. Rural areas vote Republican, and Caribou County sits in the bottom quarter on density (about 3%, below 97% of counties).
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Caribou County, ID sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Caribou County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Caribou 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%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Bear Lake County, ID R+71
- Franklin County, ID R+77
- Lincoln County, WY R+66
- Bannock County, ID R+25
- Oneida County, ID R+76
- Bingham County, ID R+54
- Power County, ID R+46
- Bonneville County, ID R+43
- Rich County, UT R+66
- Cache County, UT R+32
Counties with Similar Populations
- Shannon County, MO R+68
- Goliad County, TX R+60
- Blaine County, MT Even
- Lake County, TN R+37
- Ida County, IA R+57
- Bon Homme County, SD R+58
- Beaver County, UT R+69
- Nemaha County, NE R+45
- Brooks County, TX D+7
- Pocahontas County, IA R+48
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.