92231 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 44% of adults in 92231 typically vote, below the U.S. average of about 62%. Among adults in 92231, ~25% vote Democratic, ~19% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How 92231 compares
Among zip codes within 15 miles, 92231 is the most Democratic-leaning.
92231 runs about 8 points more Republican than California as a whole.
Politics vary noticeably by block within 92231. The south side runs the most Democratic (D+19) and the northwest side runs the most Republican (R+9), a spread of about 29 points.
Why 92231 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 92231, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 81% of residents in 92231 live in densely developed areas, about 45 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in 92231 have never been married, above 86% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 92231, CA sits in the top tenth nationally on this measure.
Why turnout in 92231 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 92231 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 49%, about 13 points below the California average of 62%. Renters vote less often than owners, and about 50% of households in 92231 rent, about 25 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 34% of adults in 92231 report food insecurity, 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.