95842 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 49% of adults in 95842 typically vote, below the U.S. average of about 62%. Among adults in 95842, ~26% vote Democratic, ~23% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How 95842 compares
Among zip codes within 15 miles, 95842 leans more Democratic than 20 of 48 neighbors.
95842 runs about 14 points more Republican than California as a whole.
Politics vary noticeably by block within 95842. The southwest side runs the most Democratic (D+15) and the northeast side runs the most Republican (R+7), a spread of about 22 points.
Why 95842 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 95842, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 95842 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in 95842 have never been married, above 85% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 95842, 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 95842 looks the way it does
Renters vote less often than owners. About 48% of households in 95842 rent, about 23 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 23% of adults in 95842 report food insecurity, above 86% of zip codes. Low high-school completion lines up with lower turnout, and about 86% of adults in 95842 have completed high school, below 78% 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.