92139 leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.
About 52% of adults in 92139 typically vote, below the U.S. average of about 62%. Among adults in 92139, ~32% vote Democratic, ~20% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How 92139 compares
Among zip codes within 15 miles, 92139 leans more Democratic than 21 of 50 neighbors.
Politically, 92139 sits close to the rest of California.
Politics vary noticeably by block within 92139. The north side is the most Democratic-leaning (D+28) and the south side is the least Democratic-leaning (D+17), a spread of about 11 points.
Why 92139 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 92139, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 92139 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 38% of adults in 92139 have never been married, above 84% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 92139, CA sits in the top tenth nationally on this measure.
Why turnout in 92139 looks the way it does
Crowded housing lines up with lower turnout. About 10% of homes in 92139 have more than one occupant per room, above 96% of zip codes. Renters vote less often than owners, and about 42% of households in 92139 rent, about 17 points above the U.S. average of 25%. 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.