94937 is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.
About 78% of adults in 94937 typically vote, above the U.S. average of about 62%. Among adults in 94937, ~62% vote Democratic, ~16% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 94937 compares
Among zip codes within 15 miles, 94937 leans more Democratic than 8 of 10 neighbors.
94937 runs about 37 points more Democratic than California as a whole.
Politics vary noticeably by block within 94937. The east side is the most Democratic-leaning (D+60) and the southwest side is the least Democratic-leaning (D+43), a spread of about 18 points.
Why 94937 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 94937, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 60% of adults in 94937 hold a bachelor's degree, about 32 points above the U.S. average of 28%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 94937, CA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 94937 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 94937 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in 94937 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.