95233 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 86% of adults in 95233 typically vote, above the U.S. average of about 62%. Among adults in 95233, ~39% vote Democratic, ~47% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 95233 compares
Among zip codes within 15 miles, 95233 leans more Republican than 5 of 15 neighbors.
95233 runs about 30 points more Republican than California as a whole. California leans Democratic overall, while 95233 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95233. The northeast side is the most Republican-leaning (R+23) and the east side is the least Republican-leaning (R+10), a spread of about 13 points.
Why 95233 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 95233, not a ranked or complete list of what matters most.
95233 votes against the grain of California. California leans Democratic overall, while 95233 runs about 30 points more Republican. A high family-household share predicts Republican voting, and about 77% of households in 95233 are family households, above 85% of zip codes.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 95233, CA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 95233 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 95233 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 71%, about 11 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 94% of households in 95233 own their home, about 19 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in 95233 have completed high school, above 83% 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.