Bonsall leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 70% of adults in Bonsall typically vote, above the U.S. average of about 62%. Among adults in Bonsall, ~30% vote Democratic, ~40% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Bonsall compares
Among cities within 25 miles, Bonsall leans more Republican than 15 of 27 neighbors.
Bonsall runs about 35 points more Republican than California as a whole. California leans Democratic overall, while Bonsall is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Bonsall. The east side is the most Republican-leaning (R+23) and the north side is the least Republican-leaning (R+7), a spread of about 16 points.
Why Bonsall 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 Bonsall, not a ranked or complete list of what matters most.
Bonsall votes Republican even though it is densely developed (about 36%, well below the California average of 58%). Here an older population outweighs the Democratic lean that density usually predicts. Bonsall runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Bonsall, CA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Bonsall looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Bonsall 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fallbrook, CA R+8
- Vista, CA D+10
- Camp Pendleton North, CA R+25
- Rainbow, CA R+22
- Chappo, CA R+25
- Oceanside, CA D+9
- Pala, CA R+20
- Valley Center, CA R+25
- Sunny Vista, CA D+15
- San Marcos, CA D+11
Cities with Similar Populations
- Riverside, TX R+26
- Carlinville, IL R+33
- Old Fig Garden, CA D+10
- Jefferson, OH R+44
- Mineral, VA R+39
- Waterford, PA R+35
- Orange Lake, NY D+16
- Los Ranchos de Albuquerque, NM D+26
- Black Jack, MO D+82
- Drums, PA R+33
All Local Stats
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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.