90263 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 28% of adults in 90263 typically vote, below the U.S. average of about 62%. Among adults in 90263, ~20% vote Democratic, ~8% Republican, and ~72% don't vote. The map below shows estimated turnout by block group.
How 90263 compares
Among zip codes within 15 miles, 90263 leans more Democratic than 23 of 31 neighbors.
90263 runs about 23 points more Democratic than California as a whole.
Why 90263 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 90263, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 82% of adults in 90263 hold a bachelor's degree, about 54 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 76% of adults in 90263 have never been married, in the top fraction of zip codes.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 90263, CA sits in the top tenth 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 90263 looks the way it does
Strong routine healthcare access lines up with higher turnout, and 90263 sits in the top quarter on routine-care measures. 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.