92591 leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 67% of adults in 92591 typically vote, near the U.S. average of about 62%. Among adults in 92591, ~31% vote Democratic, ~36% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How 92591 compares
Among zip codes within 15 miles, 92591 leans more Republican than 1 of 13 neighbors.
92591 runs about 29 points more Republican than California as a whole. California leans Democratic overall, while 92591 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 92591. The southwest side runs the most Democratic (D+4) and the east side runs the most Republican (R+23), a spread of about 27 points.
Why 92591 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 92591, not a ranked or complete list of what matters most.
92591 votes Republican even though it is densely developed (about 88%, well above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 77% of households in 92591 are family households, above 84% of zip codes. 92591 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; 92591, 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 92591 looks the way it does
Turnout in 92591 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.