93434 leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 36% of adults in 93434 typically vote, below the U.S. average of about 62%. Among adults in 93434, ~21% vote Democratic, ~15% Republican, and ~64% don't vote. The map below shows estimated turnout by block group.
How 93434 compares
Among zip codes within 15 miles, 93434 is the most Democratic-leaning.
93434 runs about 5 points more Republican than California as a whole.
Politics vary noticeably by block within 93434. The east side is the most Democratic-leaning (D+19) and the northeast side is the least Democratic-leaning (D+5), a spread of about 14 points.
Why 93434 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 93434, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 43% of adults in 93434 have never been married, well above similar-sized zip codes (around 27%).
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 93434, 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 93434 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 93434 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 46%, about 16 points below the California average of 62%. Renters vote less often than owners, and about 46% of households in 93434 rent, about 21 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 38% of adults in 93434 report food insecurity, above 98% 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.