95389 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 46% of adults in 95389 typically vote, below the U.S. average of about 62%. Among adults in 95389, ~27% vote Democratic, ~19% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 95389 compares
Politically, 95389 sits close to the rest of California.
Politics vary noticeably by block within 95389. The east side runs the most Democratic (D+23) and the north side runs the most Republican (R+14), a spread of about 36 points.
Why 95389 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 95389, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 43% of adults in 95389 hold a bachelor's degree, about 15 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 51% of adults in 95389 have never been married, above 95% of zip codes.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 95389, CA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95389 looks the way it does
Renters vote less often than owners. About 59% of households in 95389 rent, about 34 points above the U.S. average of 25%. 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.