95355 leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 61% of adults in 95355 typically vote, near the U.S. average of about 62%. Among adults in 95355, ~28% vote Democratic, ~33% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 95355 compares
Among zip codes within 15 miles, 95355 leans more Republican than 4 of 20 neighbors.
95355 runs about 27 points more Republican than California as a whole. California leans Democratic overall, while 95355 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95355. The east side is the most split-leaning (R+12) and the southwest side is the least split-leaning (Even), a spread of about 10 points.
Why 95355 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 95355, not a ranked or complete list of what matters most.
95355 votes Republican even though it is densely developed (about 97%, far above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. 95355 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 95355, CA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95355 looks the way it does
Renters vote less often than owners. About 37% of households in 95355 rent, about 12 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 5% of homes in 95355 have more than one occupant per room, above 86% 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.