93066 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 48% of adults in 93066 typically vote, below the U.S. average of about 62%. Among adults in 93066, ~20% vote Democratic, ~28% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 93066 compares
Among zip codes within 15 miles, 93066 leans more Republican than 19 of 20 neighbors.
93066 runs about 35 points more Republican than California as a whole. California leans Democratic overall, while 93066 is one of the few Republican-leaning pockets.
Why 93066 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 93066, not a ranked or complete list of what matters most.
93066 votes against the grain of California. California leans Democratic overall, while 93066 runs about 35 points more Republican. A high family-household share predicts Republican voting, and about 75% of households in 93066 are family households, above 81% of zip codes.
Housing overcrowding and voter turnout
Places with heavy housing overcrowding tend to turn out at a lower rate; 93066, CA sits in the top tenth nationally on this measure.
Why turnout in 93066 looks the way it does
Areas with low high-school completion turn out at lower rates. About 86% of adults in 93066 have completed high school, below 78% of zip codes. Strong routine healthcare access lines up with higher turnout, and 93066 sits in the top quarter on routine-care measures. Crowded housing lines up with lower turnout, and about 6% of homes in 93066 have more than one occupant per room, above 91% 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.