Klamath County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 71% of adults in Klamath County typically vote, above the U.S. average of about 62%. Among adults in Klamath County, ~23% vote Democratic, ~48% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How Klamath County compares
Klamath County runs about 48 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Klamath County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Klamath County. The southeast side is the most Republican-leaning (R+56) and the west side is the least Republican-leaning (R+29), a spread of about 27 points.
Why Klamath 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 Klamath County, not a ranked or complete list of what matters most.
Klamath County votes Republican even though it is densely developed (about 50%, well above the Oregon average of 31%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Klamath County runs against the grain of Oregon, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Klamath County, OR sits in the top quarter nationally on this measure.
Why turnout in Klamath County looks the way it does
Turnout in Klamath 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
- Jackson County, OR R+3
- Siskiyou County, CA R+17
- Lake County, OR R+61
- Modoc County, CA R+44
- Josephine County, OR R+25
- Douglas County, OR R+29
- Shasta County, CA R+30
- Deschutes County, OR D+5
- Del Norte County, CA R+15
- Curry County, OR R+11
Counties with Similar Populations
- Troup County, GA R+11
- Greenwood County, SC R+18
- Columbia County, FL R+44
- Blue Earth County, MN R+6
- Ward County, ND R+32
- Iberia Parish, LA R+24
- Harrison County, TX R+39
- York County, VA R+3
- San Patricio County, TX R+31
- Greene County, TN R+62
Sources and methodology
Precinct-level voting records used to fit the model come from Oregon Secretary of State, Elections Division, 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.