95602 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 75% of adults in 95602 typically vote, above the U.S. average of about 62%. Among adults in 95602, ~32% vote Democratic, ~43% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How 95602 compares
Among zip codes within 15 miles, 95602 leans more Republican than 3 of 15 neighbors.
95602 runs about 36 points more Republican than California as a whole. California leans Democratic overall, while 95602 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95602. The northwest side is the most Republican-leaning (R+32) and the northeast side is the least Republican-leaning (R+7), a spread of about 25 points.
Why 95602 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 95602, not a ranked or complete list of what matters most.
95602 votes against the grain of California. California leans Democratic overall, while 95602 runs about 36 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in 95602 are family households, above 81% of zip codes.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 95602, CA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95602 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 95602 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 70%, about 10 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.