95203 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 43% of adults in 95203 typically vote, below the U.S. average of about 62%. Among adults in 95203, ~27% vote Democratic, ~16% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 95203 compares
Among zip codes within 15 miles, 95203 leans more Democratic than 19 of 21 neighbors.
95203 runs about 8 points more Democratic than California as a whole.
Politics vary noticeably by block within 95203. The northeast side is the most Democratic-leaning (D+37) and the northwest side is the least Democratic-leaning (D+20), a spread of about 17 points.
Why 95203 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 95203, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 95203 live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 48% of adults in 95203 have never been married, above 94% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 95203, CA sits in the top 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 95203 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 95203 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 45%, about 17 points below the California average of 62%. Renters vote less often than owners, and about 60% of households in 95203 rent, about 35 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 35% of adults in 95203 report food insecurity, above 97% 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.