95336 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 55% of adults in 95336 typically vote, below the U.S. average of about 62%. Among adults in 95336, ~25% vote Democratic, ~30% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How 95336 compares
Among zip codes within 15 miles, 95336 leans more Republican than 16 of 21 neighbors.
95336 runs about 30 points more Republican than California as a whole. California leans Democratic overall, while 95336 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95336. The south side runs the most Democratic (D+4) and the northeast side runs the most Republican (R+33), a spread of about 37 points.
Why 95336 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 95336, not a ranked or complete list of what matters most.
95336 votes Republican even though it is densely developed (about 86%, 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 76% of households in 95336 are family households, above 83% of zip codes. 95336 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; 95336, 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 95336 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 95336 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Crowded housing lines up with lower turnout, and about 7% of homes in 95336 have more than one occupant per room, above 92% 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.