93553 leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 60% of adults in 93553 typically vote, near the U.S. average of about 62%. Among adults in 93553, ~26% vote Democratic, ~34% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 93553 compares
Among zip codes within 15 miles, 93553 leans more Republican than 5 of 6 neighbors.
93553 runs about 33 points more Republican than California as a whole. California leans Democratic overall, while 93553 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 93553. The south side is the most split-leaning (R+16) and the northeast side is the least split-leaning (R+2), a spread of about 14 points.
Why 93553 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 93553, not a ranked or complete list of what matters most.
93553 votes against the grain of California. California leans Democratic overall, while 93553 runs about 33 points more Republican. Low college attainment predicts Republican voting, and 93553 sits in the bottom quarter (about 16%, below 76% of zip codes).
High-school completion and voter turnout
Places with low high-school-completion share tend to turn out at a lower rate; 93553, CA sits in the bottom quarter nationally on this measure.
Why turnout in 93553 looks the way it does
Crowded housing lines up with lower turnout. About 16% of homes in 93553 have more than one occupant per room, in the top fraction of zip codes. Low high-school completion lines up with lower turnout, and about 84% of adults in 93553 have completed high school, below 84% 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.