95337 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 57% of adults in 95337 typically vote, near the U.S. average of about 62%. Among adults in 95337, ~27% vote Democratic, ~30% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How 95337 compares
Among zip codes within 15 miles, 95337 leans more Republican than 11 of 19 neighbors.
95337 runs about 27 points more Republican than California as a whole. California leans Democratic overall, while 95337 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95337. The northeast side runs the most Democratic (D+8) and the south side runs the most Republican (R+36), a spread of about 44 points.
Why 95337 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 95337, not a ranked or complete list of what matters most.
95337 votes Republican even though it is densely developed (about 74%, well above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 81% of households in 95337 are family households, above 92% of zip codes. 95337 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 95337, CA does.
Why turnout in 95337 looks the way it does
Crowded housing lines up with lower turnout. About 6% of homes in 95337 have more than one occupant per room, above 90% 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.