95634 leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 71% of adults in 95634 typically vote, above the U.S. average of about 62%. Among adults in 95634, ~28% vote Democratic, ~43% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 95634 compares
Among zip codes within 15 miles, 95634 leans more Republican than 6 of 14 neighbors.
95634 runs about 41 points more Republican than California as a whole. California leans Democratic overall, while 95634 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95634. The west side is the most Republican-leaning (R+28) and the east side is the least Republican-leaning (R+11), a spread of about 17 points.
Why 95634 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 95634, not a ranked or complete list of what matters most.
95634 votes against the grain of California. California leans Democratic overall, while 95634 runs about 41 points more Republican.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 95634, CA sits below the national average 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 95634 looks the way it does
Homeowners vote more often than renters. About 88% of households in 95634 own their home, about 26 points above the California average of 62%. High high-school completion lines up with higher turnout, and about 96% of adults in 95634 have completed high school, above 80% 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.