Amador County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 67% of adults in Amador County typically vote, near the U.S. average of about 62%. Among adults in Amador County, ~22% vote Democratic, ~45% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Amador County compares
Among counties within 50 miles, Amador County is the most Republican-leaning.
Amador County runs about 55 points more Republican than California as a whole. California leans Democratic overall, while Amador County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Amador County. The west side is the most Republican-leaning (R+48) and the east side is the least Republican-leaning (R+28), a spread of about 20 points.
Why Amador 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 Amador County, not a ranked or complete list of what matters most.
Amador County votes against the grain of California. California leans Democratic overall, while Amador County runs about 55 points more Republican.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Amador County, CA sits in the top quarter nationally on this measure.
Why turnout in Amador County looks the way it does
Homeowners vote more often than renters. About 81% of households in Amador County own their home, about 19 points above the California average of 62%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Calaveras County, CA R+29
- El Dorado County, CA R+13
- Sacramento County, CA D+20
- Placer County, CA R+11
- Tuolumne County, CA R+18
- San Joaquin County, CA D+4
- Yolo County, CA D+35
- Stanislaus County, CA R+8
- Alpine County, CA D+36
- Nevada County, CA D+11
Counties with Similar Populations
- Fayette County, WV R+46
- LaGrange County, IN R+63
- McKean County, PA R+43
- Tazewell County, VA R+58
- Wyoming County, NY R+39
- Delaware County, OK R+58
- Pasquotank County, NC Even
- Ottawa County, OH R+30
- Rio Arriba County, NM D+20
- Orleans County, NY R+32
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.