95691 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 61% of adults in 95691 typically vote, near the U.S. average of about 62%. Among adults in 95691, ~38% vote Democratic, ~23% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 95691 compares
Among zip codes within 15 miles, 95691 leans more Democratic than 19 of 44 neighbors.
Politically, 95691 sits close to the rest of California.
Politics vary noticeably by block within 95691. The east side runs the most Democratic (D+37) and the northwest side runs the most Republican (Even), a spread of about 38 points.
Why 95691 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 95691, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 83% of residents in 95691 live in densely developed areas, about 47 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 95691 sits in the top quarter (about 39%, above 79% of zip codes). A high never-married share predicts Democratic voting, and about 35% of adults in 95691 have never been married, above 80% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 95691, CA sits in the top quarter nationally on this measure.
Why turnout in 95691 looks the way it does
Crowded housing lines up with lower turnout. About 7% of homes in 95691 have more than one occupant per room, above 91% 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.