95511 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 63% of adults in 95511 typically vote, near the U.S. average of about 62%. Among adults in 95511, ~40% vote Democratic, ~23% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 95511 compares
Among zip codes within 15 miles, 95511 is the most Democratic-leaning.
95511 runs about 8 points more Democratic than California as a whole.
Politics vary noticeably by block within 95511. The northwest side is the most Democratic-leaning (D+32) and the southeast side is the least Democratic-leaning (D+9), a spread of about 23 points.
Why 95511 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 95511, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 65% of adults in 95511 have never been married, far above similar-sized zip codes (around 21%).
Population density and Republican lean
Places with low population density tend to lean Republican; 95511, CA sits in the bottom tenth nationally on this measure.
Why turnout in 95511 looks the way it does
Turnout in 95511 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.