90002 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 33% of adults in 90002 typically vote, below the U.S. average of about 62%. Among adults in 90002, ~24% vote Democratic, ~9% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.
How 90002 compares
Among zip codes within 15 miles, 90002 leans more Democratic than 111 of 172 neighbors.
90002 runs about 29 points more Democratic than California as a whole.
Politics vary noticeably by block within 90002. The southwest side is the most Democratic-leaning (D+54) and the northeast side is the least Democratic-leaning (D+38), a spread of about 16 points.
Why 90002 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 90002, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 90002 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 54% of adults in 90002 have never been married, above 97% of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 90002, CA sits in the bottom 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 90002 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 90002 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 44%, about 18 points below the California average of 62%. Renters vote less often than owners, and about 59% of households in 90002 rent, about 34 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 44% of adults in 90002 report food insecurity, in the top fraction 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.