90254 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 75% of adults in 90254 typically vote, above the U.S. average of about 62%. Among adults in 90254, ~51% vote Democratic, ~24% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How 90254 compares
Among zip codes within 15 miles, 90254 leans more Democratic than 29 of 100 neighbors.
90254 runs about 17 points more Democratic than California as a whole.
Politics vary noticeably by block within 90254. The northwest side is the most Democratic-leaning (D+44) and the southeast side is the least Democratic-leaning (D+33), a spread of about 11 points.
Why 90254 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 90254, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 93% of residents in 90254 live in densely developed areas, about 56 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 90254 sits in the top quarter (about 76%, in the top fraction of zip codes). A high never-married share predicts Democratic voting, and about 39% of adults in 90254 have never been married, above 86% of zip codes.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 90254, 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 90254 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 90254 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 90254 have completed high school, 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.