95661 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 76% of adults in 95661 typically vote, above the U.S. average of about 62%. Among adults in 95661, ~36% vote Democratic, ~40% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 95661 compares
Among zip codes within 15 miles, 95661 leans more Republican than 22 of 37 neighbors.
95661 runs about 26 points more Republican than California as a whole. California leans Democratic overall, while 95661 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 95661. The southeast side is the most split-leaning (R+21) and the northeast side is the least split-leaning (Even), a spread of about 19 points.
Why 95661 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 95661, not a ranked or complete list of what matters most.
95661 votes Republican even though it is densely developed (about 97%, far above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. 95661 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 95661, CA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 95661 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 95661 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 71%, about 11 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.