95412 is a Democratic stronghold. About 75% of voters here vote Democratic and 25% Republican.
About 66% of adults in 95412 typically vote, near the U.S. average of about 62%. Among adults in 95412, ~49% vote Democratic, ~17% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 95412 compares
Among zip codes within 15 miles, 95412 is the least Democratic-leaning.
95412 runs about 30 points more Democratic than California as a whole.
Politics vary noticeably by block within 95412. The southwest side is the most Democratic-leaning (D+65) and the west side is the least Democratic-leaning (D+49), a spread of about 16 points.
Why 95412 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 95412, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 48% of adults in 95412 hold a bachelor's degree, about 20 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 37% of adults in 95412 have never been married, above 83% of zip codes.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 95412, CA does.
Why turnout in 95412 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 95412 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 69%, about 9 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.