93220 leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 51% of adults in 93220 typically vote, below the U.S. average of about 62%. Among adults in 93220, ~15% vote Democratic, ~36% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 93220 compares
Among zip codes within 15 miles, 93220 is the most Republican-leaning.
93220 runs about 63 points more Republican than California as a whole. California leans Democratic overall, while 93220 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 93220. The southeast side is the most Republican-leaning (R+46) and the northwest side is the least Republican-leaning (R+36), a spread of about 11 points.
Why 93220 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 93220, not a ranked or complete list of what matters most.
93220 votes against the grain of California. California leans Democratic overall, while 93220 runs about 63 points more Republican. Low college attainment predicts Republican voting, and 93220 sits in the bottom quarter (about 16%, below 78% of zip codes).
High-school completion and voter turnout
Places with low high-school-completion share tend to turn out at a lower rate; 93220, CA sits in the bottom tenth nationally on this measure.
Why turnout in 93220 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 93220 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 22% of adults in 93220 report food insecurity, above 83% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
- 76874, TX R+74
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.