94720 is a Democratic stronghold. About 85% of voters here vote Democratic and 15% Republican.
About 35% of adults in 94720 typically vote, below the U.S. average of about 62%. Among adults in 94720, ~30% vote Democratic, ~5% Republican, and ~65% don't vote. The map below shows estimated turnout by block group.
How 94720 compares
Among zip codes within 15 miles, 94720 leans more Democratic than 63 of 87 neighbors.
94720 runs about 50 points more Democratic than California as a whole.
Politics vary noticeably by block within 94720. The south side is the most Democratic-leaning (D+73) and the west side is the least Democratic-leaning (D+58), a spread of about 15 points.
Why 94720 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 94720, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 94720 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 94720 sits in the top quarter (about 81%, in the top fraction of zip codes). A high never-married share predicts Democratic voting, and about 98% of adults in 94720 have never been married, in the top fraction of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 94720, CA sits in the top tenth nationally on this measure.
Why turnout in 94720 looks the way it does
Renters vote less often than owners. About 96% of households in 94720 rent, about 71 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 33% of adults in 94720 report food insecurity, above 96% of zip codes. Low high-school completion lines up with lower turnout, and more than 99% of adults in 94720 have completed high school, in the top fraction 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.