Camas County is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 69% of adults in Camas County typically vote, above the U.S. average of about 62%. Among adults in Camas County, ~10% vote Democratic, ~59% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Camas County compares
Among counties within 50 miles, Camas County is the most Republican-leaning.
Camas County runs about 36 points more Republican than Idaho as a whole.
Why Camas 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 Camas County, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 1% of residents in Camas County live in densely developed areas, about 17 points below the Idaho average of 18%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Camas County, ID sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Camas County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Camas 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Blaine County, ID D+21
- Lincoln County, ID R+63
- Gooding County, ID R+54
- Jerome County, ID R+48
- Elmore County, ID R+42
- Twin Falls County, ID R+45
- Custer County, ID R+52
- Boise County, ID R+50
- Minidoka County, ID R+58
- Butte County, ID R+75
Counties with Similar Populations
- Prairie County, MT R+68
- Motley County, TX R+75
- Foard County, TX R+69
- Glasscock County, TX R+85
- Sioux County, NE R+79
- Garfield County, MT R+87
- Alpine County, CA D+36
- Billings County, ND R+67
- Wibaux County, MT R+75
- Daggett County, UT R+59
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.