90230 leans heavily Democratic by roughly 50 points: about 75% of voters vote Democratic and 25% Republican.
About 69% of adults in 90230 typically vote, above the U.S. average of about 62%. Among adults in 90230, ~52% vote Democratic, ~17% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 90230 compares
Among zip codes within 15 miles, 90230 leans more Democratic than 89 of 143 neighbors.
90230 runs about 29 points more Democratic than California as a whole.
Politics vary noticeably by block within 90230. The southeast side is the most Democratic-leaning (D+58) and the southwest side is the least Democratic-leaning (D+42), a spread of about 17 points.
Why 90230 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 90230, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 90230 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 90230 sits in the top quarter (about 55%, above 92% of zip codes). A high never-married share predicts Democratic voting, and about 34% of adults in 90230 have never been married, above 77% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 90230, CA sits in the top tenth nationally on this measure.
Why turnout in 90230 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 90230 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 70%, about 10 points above the U.S. average of 60%. 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.