91792 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 50% of adults in 91792 typically vote, below the U.S. average of about 62%. Among adults in 91792, ~31% vote Democratic, ~19% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How 91792 compares
Among zip codes within 15 miles, 91792 leans more Democratic than 57 of 83 neighbors.
Politically, 91792 sits close to the rest of California.
Why 91792 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 91792, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 91792 live in densely developed areas, about 58 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 40% of adults in 91792 have never been married, above 88% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 91792, CA sits in the top tenth nationally on this measure.
Why turnout in 91792 looks the way it does
Renters vote less often than owners. About 43% of households in 91792 rent, about 18 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 8% of homes in 91792 have more than one occupant per room, above 93% 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.