94305 is a Democratic stronghold. About 82% of voters here vote Democratic and 18% Republican.
About 40% of adults in 94305 typically vote, below the U.S. average of about 62%. Among adults in 94305, ~32% vote Democratic, ~7% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 94305 compares
Among zip codes within 15 miles, 94305 leans more Democratic than 48 of 50 neighbors.
94305 runs about 44 points more Democratic than California as a whole.
Politics vary noticeably by block within 94305. The east side is the most Democratic-leaning (D+67) and the north side is the least Democratic-leaning (D+46), a spread of about 21 points.
Why 94305 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 94305, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 87% of adults in 94305 hold a bachelor's degree, about 58 points above the U.S. average of 28%. Dense areas vote Democratic, and 94305 sits in the top fifth on density (about 96%, above 92% of zip codes). A high never-married share predicts Democratic voting, and about 84% of adults in 94305 have never been married, in the top fraction of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 94305, CA sits in the top tenth nationally on this measure.
Why turnout in 94305 looks the way it does
Renters vote less often than owners. About 84% of households in 94305 rent, about 59 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 5% of homes in 94305 have more than one occupant per room, above 86% 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.