95423 is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 68% of adults in 95423 typically vote, above the U.S. average of about 62%. Among adults in 95423, ~33% vote Democratic, ~35% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 95423 compares
Among zip codes within 15 miles, 95423 sits roughly in the middle of the political spectrum, with 4 neighbors leaning further in the place's direction and 5 leaning the other way.
95423 runs about 22 points more Republican than California as a whole. California leans Democratic overall, while 95423 sits closer to the political middle.
Politics vary noticeably by block within 95423. The west side runs the most Democratic (D+5) and the north side runs the most Republican (R+10), a spread of about 15 points.
Why 95423 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 95423, not a ranked or complete list of what matters most.
95423 votes against the grain of California. California leans Democratic overall, while 95423 runs about 22 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 95423, CA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 95423 looks the way it does
Turnout in 95423 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.