95220 leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 49% of adults in 95220 typically vote, below the U.S. average of about 62%. Among adults in 95220, ~13% vote Democratic, ~36% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How 95220 compares
Among zip codes within 15 miles, 95220 leans more Republican than 14 of 16 neighbors.
95220 runs about 66 points more Republican than California as a whole. California leans Democratic overall, while 95220 is one of the few Republican-leaning pockets.
Why 95220 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 95220, not a ranked or complete list of what matters most.
95220 votes against the grain of California. California leans Democratic overall, while 95220 runs about 66 points more Republican. A high family-household share predicts Republican voting, and about 79% of households in 95220 are family households, above 89% of zip codes.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 95220, CA sits below the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95220 looks the way it does
Areas with low high-school completion turn out at lower rates. About 83% of adults in 95220 have completed high school, about 7 points below the U.S. average of 90%. 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.