94964 leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.
About 37% of adults in 94964 typically vote, below the U.S. average of about 62%. Among adults in 94964, ~26% vote Democratic, ~11% Republican, and ~63% don't vote. The map below shows estimated turnout by block group.
How 94964 compares
Among zip codes within 15 miles, 94964 leans more Democratic than 9 of 67 neighbors.
94964 runs about 21 points more Democratic than California as a whole.
Politics vary noticeably by block within 94964. The north side is the most Democratic-leaning (D+52) and the southwest side is the least Democratic-leaning (D+40), a spread of about 12 points.
Why 94964 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 94964, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 89% of residents in 94964 live in densely developed areas, about 53 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 50% of adults in 94964 have never been married, above 95% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 94964, CA sits in the top quarter 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 94964 looks the way it does
Renters vote less often than owners. About 96% of households in 94964 rent, about 71 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 75% of adults in 94964 have completed high school, below 96% 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.