El Dorado County leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 79% of adults in El Dorado County typically vote, above the U.S. average of about 62%. Among adults in El Dorado County, ~35% vote Democratic, ~44% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How El Dorado County compares
Among counties within 50 miles, El Dorado County leans more Republican than 4 of 7 neighbors.
El Dorado County runs about 33 points more Republican than California as a whole. California leans Democratic overall, while El Dorado County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within El Dorado County. The northeast side runs the most Democratic (D+18) and the southeast side runs the most Republican (R+30), a spread of about 48 points.
Why El Dorado 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 El Dorado County, not a ranked or complete list of what matters most.
El Dorado County votes against the grain of California. California leans Democratic overall, while El Dorado County runs about 33 points more Republican. A high family-household share predicts Republican voting, and about 71% of households in El Dorado County are family households, above 85% of counties.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as El Dorado County, CA does.
Why turnout in El Dorado County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. El Dorado 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%. High high-school completion lines up with higher turnout, and about 95% of adults in El Dorado County have completed high school, above 92% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Amador County, CA R+35
- Placer County, CA R+11
- Nevada County, CA D+11
- Sacramento County, CA D+20
- Calaveras County, CA R+29
- Yuba County, CA R+16
- Alpine County, CA D+36
- Yolo County, CA D+35
- Sutter County, CA R+23
- Douglas County, NV R+32
Counties with Similar Populations
- Outagamie County, WI R+13
- Sarpy County, NE R+10
- Saginaw County, MI D+2
- Ellis County, TX R+31
- Butler County, PA R+28
- Livingston County, MI R+23
- Santa Rosa County, FL R+49
- Hernando County, FL R+33
- Beaufort County, SC R+9
- Charlotte County, FL R+33
Sources and methodology
Precinct-level voting records used to fit the model come from California 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.