93666 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 29% of adults in 93666 typically vote, below the U.S. average of about 62%. Among adults in 93666, ~12% vote Democratic, ~17% Republican, and ~71% don't vote. The map below shows estimated turnout by block group.
How 93666 compares
Among zip codes within 15 miles, 93666 leans more Republican than 8 of 11 neighbors.
93666 runs about 38 points more Republican than California as a whole. California leans Democratic overall, while 93666 is one of the few Republican-leaning pockets.
Why 93666 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 93666, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 84% of households in 93666 are family households, about 18 points above the U.S. average of 67%. 93666 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 93666, CA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 93666 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 93666 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 42%, about 19 points below the California average of 62%. Renters vote less often than owners, and about 53% of households in 93666 rent, about 28 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 44% of adults in 93666 report food insecurity, in the top fraction of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.