92590 leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 46% of adults in 92590 typically vote, below the U.S. average of about 62%. Among adults in 92590, ~18% vote Democratic, ~28% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 92590 compares
Among zip codes within 15 miles, 92590 leans more Republican than 10 of 12 neighbors.
92590 runs about 40 points more Republican than California as a whole. California leans Democratic overall, while 92590 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 92590. The northwest side is the most Republican-leaning (R+39) and the southeast side is the least Republican-leaning (R+5), a spread of about 34 points.
Why 92590 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 92590, not a ranked or complete list of what matters most.
92590 votes against the grain of California. California leans Democratic overall, while 92590 runs about 40 points more Republican.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 92590, CA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 92590 looks the way it does
Renters vote less often than owners. About 62% of households in 92590 rent, about 37 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 10% of homes in 92590 have more than one occupant per room, above 96% 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.