90620 is a true toss-up. About 51% of voters here vote Democratic and 49% Republican.
About 59% of adults in 90620 typically vote, near the U.S. average of about 62%. Among adults in 90620, ~30% vote Democratic, ~29% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 90620 compares
Among zip codes within 15 miles, 90620 sits roughly in the middle of the political spectrum, with 22 neighbors leaning further in the place's direction and 82 leaning the other way.
90620 runs about 17 points more Republican than California as a whole.
Why 90620 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 90620. The lean here lands roughly where demographic data alone would predict.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 90620, CA sits in the top tenth nationally on this measure.
Why turnout in 90620 looks the way it does
Crowded housing lines up with lower turnout. About 10% of homes in 90620 have more than one occupant per room, above 96% of zip codes. Renters vote less often than owners, and about 34% of households in 90620 rent, above 80% 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.