92309 leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 29% of adults in 92309 typically vote, below the U.S. average of about 62%. Among adults in 92309, ~11% vote Democratic, ~18% Republican, and ~71% don't vote. The map below shows estimated turnout by block group.
How 92309 compares
92309 runs about 47 points more Republican than California as a whole. California leans Democratic overall, while 92309 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 92309. The northwest side runs the most Democratic (D+5) and the west side runs the most Republican (R+27), a spread of about 33 points.
Why 92309 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 92309, not a ranked or complete list of what matters most.
92309 votes against the grain of California. California leans Democratic overall, while 92309 runs about 47 points more Republican. Rural areas vote Republican, and 92309 sits in the bottom quarter on density (fewer than 1%, in the bottom fraction of zip codes). Low college attainment predicts Republican voting, and 92309 sits in the bottom quarter (about 7%, below 98% of zip codes).
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 92309, CA sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 92309 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 92309 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 50%, about 12 points below the California average of 62%. Renters vote less often than owners, and about 56% of households in 92309 rent, about 31 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 27% of adults in 92309 report food insecurity, above 91% 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.