95939 is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 44% of adults in 95939 typically vote, below the U.S. average of about 62%. Among adults in 95939, ~8% vote Democratic, ~35% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 95939 compares
95939 runs about 82 points more Republican than California as a whole. California leans Democratic overall, while 95939 is one of the few Republican-leaning pockets.
Why 95939 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 95939, not a ranked or complete list of what matters most.
95939 votes against the grain of California. California leans Democratic overall, while 95939 runs about 82 points more Republican. Rural areas vote Republican, and 95939 sits in the bottom quarter on density (about 2%, below 96% of zip codes).
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 95939, CA sits in the bottom tenth 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 95939 looks the way it does
Renters vote less often than owners. About 38% of households in 95939 rent, about 13 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 6% of homes in 95939 have more than one occupant per room, above 89% of zip codes. Low high-school completion lines up with lower turnout, and about 85% of adults in 95939 have completed high school, below 82% 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.