95425 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 53% of adults in 95425 typically vote, below the U.S. average of about 62%. Among adults in 95425, ~36% vote Democratic, ~17% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 95425 compares
Among zip codes within 15 miles, 95425 leans more Democratic than 1 of 3 neighbors.
95425 runs about 13 points more Democratic than California as a whole.
Politics vary noticeably by block within 95425. The east side is the most Democratic-leaning (D+48) and the south side is the least Democratic-leaning (D+27), a spread of about 21 points.
Why 95425 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 95425. The lean here lands roughly where demographic data alone would predict.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 95425, CA sits in the top quarter nationally on this measure.
Why turnout in 95425 looks the way it does
Crowded housing lines up with lower turnout. About 6% of homes in 95425 have more than one occupant per room, above 91% of zip codes. Low high-school completion lines up with lower turnout, and about 85% of adults in 95425 have completed high school, below 80% 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.