93644 leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 75% of adults in 93644 typically vote, above the U.S. average of about 62%. Among adults in 93644, ~30% vote Democratic, ~45% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How 93644 compares
Among zip codes within 15 miles, 93644 leans more Republican than 1 of 8 neighbors.
93644 runs about 41 points more Republican than California as a whole. California leans Democratic overall, while 93644 is one of the few Republican-leaning pockets.
Why 93644 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 93644, not a ranked or complete list of what matters most.
93644 votes against the grain of California. California leans Democratic overall, while 93644 runs about 41 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 93644, CA sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 93644 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 93644 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 66%, about 6 points above the U.S. average of 60%. 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.