93455 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 74% of adults in 93455 typically vote, above the U.S. average of about 62%. Among adults in 93455, ~35% vote Democratic, ~39% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 93455 compares
Among zip codes within 15 miles, 93455 leans more Republican than 6 of 7 neighbors.
93455 runs about 26 points more Republican than California as a whole. California leans Democratic overall, while 93455 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 93455. The northeast side runs the most Democratic (D+3) and the south side runs the most Republican (R+13), a spread of about 16 points.
Why 93455 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 93455, not a ranked or complete list of what matters most.
93455 votes Republican even though it is densely developed (about 84%, well above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 75% of households in 93455 are family households, above 79% of zip codes. 93455 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 93455, CA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 93455 looks the way it does
Turnout in 93455 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
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.