93623 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 81% of adults in 93623 typically vote, above the U.S. average of about 62%. Among adults in 93623, ~43% vote Democratic, ~38% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How 93623 compares
Among zip codes within 15 miles, 93623 is the most Democratic-leaning.
93623 runs about 14 points more Republican than California as a whole.
Politics vary noticeably by block within 93623. The east side runs the most Democratic (D+18) and the south side runs the most Republican (R+21), a spread of about 40 points.
Why 93623 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 93623, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 45% of adults in 93623 hold a bachelor's degree, about 16 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 38% of adults in 93623 have never been married, above 85% of zip codes.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 93623, CA sits in the bottom tenth 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 93623 looks the way it does
Turnout in 93623 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
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.