92358 leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 58% of adults in 92358 typically vote, near the U.S. average of about 62%. Among adults in 92358, ~20% vote Democratic, ~38% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 92358 compares
Among zip codes within 15 miles, 92358 leans more Republican than 20 of 22 neighbors.
92358 runs about 49 points more Republican than California as a whole. California leans Democratic overall, while 92358 is one of the few Republican-leaning pockets.
Why 92358 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 92358, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 3% of residents in 92358 live in densely developed areas, about 55 points below the California average of 58%. 92358 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 92358, CA sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 92358 looks the way it does
Areas with low high-school completion turn out at lower rates. About 83% of adults in 92358 have completed high school, about 7 points below the U.S. average of 90%. 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.