92104 is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.
About 55% of adults in 92104 typically vote, below the U.S. average of about 62%. Among adults in 92104, ~44% vote Democratic, ~11% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How 92104 compares
Among zip codes within 15 miles, 92104 leans more Democratic than 55 of 57 neighbors.
92104 runs about 39 points more Democratic than California as a whole.
Politics vary noticeably by block within 92104. The south side is the most Democratic-leaning (D+68) and the northeast side is the least Democratic-leaning (D+50), a spread of about 18 points.
Why 92104 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 92104, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 92104 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 92104 sits in the top quarter (about 55%, above 92% of zip codes). A high never-married share predicts Democratic voting, and about 52% of adults in 92104 have never been married, above 96% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 92104, CA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 92104 looks the way it does
Renters vote less often than owners. About 71% of households in 92104 rent, about 46 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 5% of homes in 92104 have more than one occupant per room, above 84% 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.