95023 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 61% of adults in 95023 typically vote, near the U.S. average of about 62%. Among adults in 95023, ~34% vote Democratic, ~27% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 95023 compares
Among zip codes within 15 miles, 95023 leans more Democratic than 1 of 3 neighbors.
95023 runs about 8 points more Republican than California as a whole.
Politics vary noticeably by block within 95023. The west side runs the most Democratic (D+26) and the northeast side runs the most Republican (R+13), a spread of about 39 points.
Why 95023 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 95023, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 77% of residents in 95023 live in densely developed areas, about 41 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 34% of adults in 95023 have never been married, above 78% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 95023, CA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 95023 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 95023 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Crowded housing lines up with lower turnout, and about 7% of homes in 95023 have more than one occupant per room, above 91% 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.