95251 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 86% of adults in 95251 typically vote, above the U.S. average of about 62%. Among adults in 95251, ~38% vote Democratic, ~48% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 95251 compares
Among zip codes within 15 miles, 95251 leans more Republican than 6 of 15 neighbors.
95251 runs about 32 points more Republican than California as a whole. California leans Democratic overall, while 95251 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95251. The southwest side is the most Republican-leaning (R+27) and the east side is the least Republican-leaning (R+9), a spread of about 18 points.
Why 95251 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 95251, not a ranked or complete list of what matters most.
95251 votes against the grain of California. California leans Democratic overall, while 95251 runs about 32 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 95251, CA sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95251 looks the way it does
Homeowners vote more often than renters. About 91% of households in 95251 own their home, about 29 points above the California average of 62%. High high-school completion lines up with higher turnout, and about 98% of adults in 95251 have completed high school, above 96% 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.