94589 leans heavily Democratic by roughly 40 points: about 70% of voters vote Democratic and 30% Republican.
About 53% of adults in 94589 typically vote, below the U.S. average of about 62%. Among adults in 94589, ~37% vote Democratic, ~16% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 94589 compares
Among zip codes within 15 miles, 94589 leans more Democratic than 14 of 19 neighbors.
94589 runs about 20 points more Democratic than California as a whole.
Politics vary noticeably by block within 94589. The northeast side is the most Democratic-leaning (D+50) and the west side is the least Democratic-leaning (D+24), a spread of about 26 points.
Why 94589 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 94589, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 91% of residents in 94589 live in densely developed areas, about 55 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 36% of adults in 94589 have never been married, above 82% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 94589, CA sits in the top tenth nationally on this measure.
Why turnout in 94589 looks the way it does
Areas with high food insecurity turn out at lower rates. About 21% of adults in 94589 report food insecurity, above 82% of zip codes. Renters vote less often than owners, and about 38% of households in 94589 rent, above 85% 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.