95823 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 40% of adults in 95823 typically vote, below the U.S. average of about 62%. Among adults in 95823, ~27% vote Democratic, ~13% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.
How 95823 compares
Among zip codes within 15 miles, 95823 leans more Democratic than 30 of 41 neighbors.
95823 runs about 15 points more Democratic than California as a whole.
Why 95823 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 95823, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 95823 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 42% of adults in 95823 have never been married, above 90% of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 95823, CA sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 95823 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 95823 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 49% of households in 95823 rent, about 24 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 30% of adults in 95823 report food insecurity, above 94% 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.