95140 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 29% of adults in 95140 typically vote, below the U.S. average of about 62%. Among adults in 95140, ~14% vote Democratic, ~15% Republican, and ~71% don't vote. The map below shows estimated turnout by block group.
How 95140 compares
Among zip codes within 15 miles, 95140 is the most Republican-leaning.
95140 runs about 26 points more Republican than California as a whole. California leans Democratic overall, while 95140 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95140. The west side runs the most Democratic (D+4) and the southeast side runs the most Republican (R+16), a spread of about 20 points.
Why 95140 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 95140, not a ranked or complete list of what matters most.
95140 votes against the grain of California. California leans Democratic overall, while 95140 runs about 26 points more Republican. A high family-household share predicts Republican voting, and about 75% of households in 95140 are family households, above 80% of zip codes.
Homeownership and voter turnout
Places with renter-heavy households tend to turn out at a lower rate; 95140, CA sits below the national average on this measure.
Why turnout in 95140 looks the way it does
Crowded housing lines up with lower turnout. About 6% of homes in 95140 have more than one occupant per room, above 91% of zip codes. Strong routine healthcare access lines up with higher turnout, and 95140 sits in the top quarter on routine-care measures. 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.