Big River leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 60% of adults in Big River typically vote, near the U.S. average of about 62%. Among adults in Big River, ~16% vote Democratic, ~44% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How Big River compares
Among cities within 25 miles, Big River leans more Republican than 5 of 6 neighbors.
Big River runs about 66 points more Republican than California as a whole. California leans Democratic overall, while Big River is one of the few Republican-leaning pockets.
Why Big River 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 Big River, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 88% of residents in Big River drive to work alone, about 15 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and Big River sits in the bottom quarter (about 11%, below 90% of cities). Big River runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Republican lean
Places with low population density tend to lean Republican; Big River, CA sits below the national average on this measure.
Why turnout in Big River looks the way it does
Turnout in Big River 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 Cities
- Earp, CA R+25
- Parker, AZ R+7
- Cienega Springs, AZ R+43
- Poston, AZ D+13
- Parker Dam, CA R+33
- Parker Strip, AZ R+60
- Lake Havasu City, AZ R+36
- Bouse, AZ R+55
- Quartzsite, AZ R+38
- Ehrenberg, AZ R+34
Cities with Similar Populations
- Baker Ridge, WV D+2
- Noxon, MT R+57
- Bolivar, WV D+26
- Salol, MN R+50
- Wilton, ND R+63
- Jetmore, KS R+77
- Shipman, MS R+87
- Jackson, NH Even
- Orangefield, TX R+69
- Tanglewood, TX R+73
All Local Stats
Home Services
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.