95548 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 46% of adults in 95548 typically vote, below the U.S. average of about 62%. Among adults in 95548, ~20% vote Democratic, ~26% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 95548 compares
95548 runs about 33 points more Republican than California as a whole. California leans Democratic overall, while 95548 is one of the few Republican-leaning pockets.
Why 95548 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 95548, not a ranked or complete list of what matters most.
95548 votes against the grain of California. California leans Democratic overall, while 95548 runs about 33 points more Republican. Rural areas vote Republican, and 95548 sits in the bottom quarter on density (about 3%, below 93% of zip codes). Low college attainment predicts Republican voting, and 95548 sits in the bottom quarter (about 17%, below 76% of zip codes).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 95548, CA sits in the bottom tenth nationally 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 95548 looks the way it does
Areas with high food insecurity turn out at lower rates. About 27% of adults in 95548 report food insecurity, about 11 points above the U.S. average of 16%. Low high-school completion lines up with lower turnout, and about 87% of adults in 95548 have completed high school, below 73% 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.