95641 leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 45% of adults in 95641 typically vote, below the U.S. average of about 62%. Among adults in 95641, ~19% vote Democratic, ~26% Republican, and ~55% don't vote. The map below shows estimated turnout by block group.
How 95641 compares
Among zip codes within 15 miles, 95641 leans more Republican than 4 of 9 neighbors.
95641 runs about 34 points more Republican than California as a whole. California leans Democratic overall, while 95641 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95641. The west side is the most Republican-leaning (R+18) and the northeast side is the least Republican-leaning (R+6), a spread of about 12 points.
Why 95641 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 95641, not a ranked or complete list of what matters most.
95641 votes against the grain of California. California leans Democratic overall, while 95641 runs about 34 points more Republican.
Housing overcrowding and voter turnout
Places with heavy housing overcrowding tend to turn out at a lower rate; 95641, CA sits in the top tenth nationally on this measure.
Why turnout in 95641 looks the way it does
Crowded housing lines up with lower turnout. About 13% of homes in 95641 have more than one occupant per room, above 98% of zip codes. High-crime urban areas turn out at lower rates, and 95641 sits in the top 15% on a violent-crime measure. 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.