92278 is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 10% of adults in 92278 typically vote, below the U.S. average of about 62%. Among adults in 92278, ~2% vote Democratic, ~7% Republican, and ~91% don't vote. The map below shows estimated turnout by block group.
How 92278 compares
92278 runs about 70 points more Republican than California as a whole. California leans Democratic overall, while 92278 is one of the few Republican-leaning pockets.
Why 92278 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 92278, not a ranked or complete list of what matters most.
92278 votes against the grain of California. California leans Democratic overall, while 92278 runs about 70 points more Republican. A high family-household share predicts Republican voting, and about 90% of households in 92278 are family households, in the top fraction of zip codes.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as 92278, CA does.
Why turnout in 92278 looks the way it does
Renters vote less often than owners. About 98% of households in 92278 rent, about 73 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and 92278 sits in the bottom quarter on routine-care measures. Low high-school completion lines up with lower turnout, and about 99% of adults in 92278 have completed high school, above 97% 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.