94928 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 61% of adults in 94928 typically vote, near the U.S. average of about 62%. Among adults in 94928, ~42% vote Democratic, ~19% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 94928 compares
Among zip codes within 15 miles, 94928 leans more Democratic than 6 of 19 neighbors.
94928 runs about 17 points more Democratic than California as a whole.
Politics vary noticeably by block within 94928. The east side is the most Democratic-leaning (D+43) and the northeast side is the least Democratic-leaning (D+30), a spread of about 14 points.
Why 94928 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 94928, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in 94928 live in densely developed areas, about 50 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 94928 have never been married, above 92% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 94928, CA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 94928 looks the way it does
Renters vote less often than owners. About 49% of households in 94928 rent, about 24 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 6% of homes in 94928 have more than one occupant per room, above 89% 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.