Sierraville leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 53% of adults in Sierraville typically vote, below the U.S. average of about 62%. Among adults in Sierraville, ~21% vote Democratic, ~32% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How Sierraville compares
Among cities within 25 miles, Sierraville leans more Republican than 17 of 25 neighbors.
Sierraville runs about 40 points more Republican than California as a whole. California leans Democratic overall, while Sierraville is one of the few Republican-leaning pockets.
Why Sierraville leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Sierraville, not a ranked or complete list of what matters most.
Sierraville votes against the grain of California. California leans Democratic overall, while Sierraville runs about 40 points more Republican. Rural areas vote Republican, and Sierraville sits in the bottom quarter on density (about 3%, below 91% of cities).
Population density and Republican lean
Places with low population density tend to lean Republican; Sierraville, CA sits in the bottom tenth nationally on this measure.
Why turnout in Sierraville looks the way it does
Areas with low high-school completion turn out at lower rates. About 99% of adults in Sierraville have completed high school, about 9 points above the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Sattley, CA R+13
- Calpine, CA R+17
- Loyalton, CA R+23
- Sierra City, CA R+12
- Clio, CA R+16
- Portola, CA R+32
- Soda Springs, CA D+25
- Beckwourth, CA R+42
Cities with Similar Populations
- Sedan, MN R+49
- Snyderville, OH R+48
- Alvan, IL R+62
- Keetonville, OK R+59
- Norway, NY R+53
- Charlemont, VA R+56
- Green Lake, TX R+64
- Maysville, CO D+6
- Tampa, KS R+66
- Wittman, MD R+13
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.