94596 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 66% of adults in 94596 typically vote, near the U.S. average of about 62%. Among adults in 94596, ~49% vote Democratic, ~17% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 94596 compares
Among zip codes within 15 miles, 94596 leans more Democratic than 29 of 62 neighbors.
94596 runs about 28 points more Democratic than California as a whole.
Politics vary noticeably by block within 94596. The northwest side is the most Democratic-leaning (D+55) and the east side is the least Democratic-leaning (D+41), a spread of about 14 points.
Why 94596 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 94596, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in 94596 hold a bachelor's degree, about 43 points above the U.S. average of 28%. Dense areas vote Democratic, and 94596 sits in the top fifth on density (about 89%, above 87% of zip codes). A high never-married share predicts Democratic voting, and about 40% of adults in 94596 have never been married, above 87% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 94596, CA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 94596 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 94596 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 75%, about 15 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 94596 have completed high school, above 92% 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.