95829 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 60% of adults in 95829 typically vote, near the U.S. average of about 62%. Among adults in 95829, ~33% vote Democratic, ~26% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 95829 compares
Among zip codes within 15 miles, 95829 leans more Democratic than 14 of 41 neighbors.
95829 runs about 8 points more Republican than California as a whole.
Politics vary noticeably by block within 95829. The north side is the most Democratic-leaning (D+18) and the northeast side is the least Democratic-leaning (D+3), a spread of about 15 points.
Why 95829 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 95829, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 95829 is about 24%, about 49 points below the U.S. average of 72%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 95829, CA sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 95829 looks the way it does
Crowded housing lines up with lower turnout. About 5% of homes in 95829 have more than one occupant per room, above 86% of zip codes. 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.