93660 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 42% of adults in 93660 typically vote, below the U.S. average of about 62%. Among adults in 93660, ~26% vote Democratic, ~16% Republican, and ~58% don't vote. The map below shows estimated turnout by block group.
How 93660 compares
Among zip codes within 15 miles, 93660 is the most Democratic-leaning.
93660 runs about 4 points more Democratic than California as a whole.
Politics vary noticeably by block within 93660. The north side runs the most Democratic (D+27) and the southeast side runs the most Republican (R+14), a spread of about 41 points.
Why 93660 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 93660, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 41% of adults in 93660 have never been married, modestly above similar-sized zip codes (around 26%).
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 93660, CA sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 93660 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 93660 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 37%, about 25 points below the California average of 62%. Renters vote less often than owners, and about 62% of households in 93660 rent, about 37 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 47% of adults in 93660 report food insecurity, 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.