92551 leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.
About 40% of adults in 92551 typically vote, below the U.S. average of about 62%. Among adults in 92551, ~24% vote Democratic, ~16% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.
How 92551 compares
Among zip codes within 15 miles, 92551 leans more Democratic than 28 of 32 neighbors.
Politically, 92551 sits close to the rest of California.
Politics vary noticeably by block within 92551. The east side is the most Democratic-leaning (D+31) and the southwest side is the least Democratic-leaning (D+13), a spread of about 18 points.
Why 92551 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 92551, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 96% of residents in 92551 live in densely developed areas, about 60 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 47% of adults in 92551 have never been married, above 94% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 92551, CA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 92551 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 92551 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 28% of adults in 92551 report food insecurity, above 93% of zip codes. Low high-school completion lines up with lower turnout, and about 77% of adults in 92551 have completed high school, below 94% 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.