94043 leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.
About 57% of adults in 94043 typically vote, near the U.S. average of about 62%. Among adults in 94043, ~40% vote Democratic, ~17% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How 94043 compares
Among zip codes within 15 miles, 94043 leans more Democratic than 39 of 61 neighbors.
94043 runs about 23 points more Democratic than California as a whole.
Politics vary noticeably by block within 94043. The south side is the most Democratic-leaning (D+51) and the north side is the least Democratic-leaning (D+25), a spread of about 26 points.
Why 94043 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 94043, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in 94043 hold a bachelor's degree, about 43 points above the U.S. average of 28%. Dense areas vote Democratic, and 94043 sits in the top fifth on density (about 98%, above 94% of zip codes). A high never-married share predicts Democratic voting, and about 38% of adults in 94043 have never been married, above 84% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 94043, CA sits in the top tenth nationally on this measure.
Why turnout in 94043 looks the way it does
Renters vote less often than owners. About 54% of households in 94043 rent, about 29 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and 94043 sits in the top quarter on routine-care measures. Crowded housing lines up with lower turnout, and about 7% of homes in 94043 have more than one occupant per room, above 92% 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.