93615 leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.
About 31% of adults in 93615 typically vote, below the U.S. average of about 62%. Among adults in 93615, ~18% vote Democratic, ~13% Republican, and ~69% don't vote. The map below shows estimated turnout by block group.
How 93615 compares
Among zip codes within 15 miles, 93615 is the most Democratic-leaning.
Politically, 93615 sits close to the rest of California.
Politics vary noticeably by block within 93615. The north side runs the most Democratic (D+26) and the southwest side runs the most Republican (R+19), a spread of about 45 points.
Why 93615 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 93615, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 48% of adults in 93615 have never been married, well above similar-sized zip codes (around 32%).
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 93615, CA sits in the bottom tenth 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 93615 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 93615 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 40%, about 21 points below the California average of 62%. Renters vote less often than owners, and about 61% of households in 93615 rent, compared to around 43% in nearby zip codes. High food insecurity lines up with lower turnout, and about 46% of adults in 93615 report food insecurity, in the top fraction 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.