92242 leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 60% of adults in 92242 typically vote, near the U.S. average of about 62%. Among adults in 92242, ~16% vote Democratic, ~44% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 92242 compares
Among zip codes within 15 miles, 92242 is the most Republican-leaning.
92242 runs about 66 points more Republican than California as a whole. California leans Democratic overall, while 92242 is one of the few Republican-leaning pockets.
Why 92242 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 92242, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 88% of residents in 92242 drive to work alone, about 14 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and 92242 sits in the bottom quarter (about 11%, below 92% of zip codes). 92242 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Adult arthritis and voter turnout
Places with a high adult-arthritis rate tend to turn out at a lower rate; 92242, CA sits in the top tenth nationally on this measure. Arthritis does not drive turnout; it reflects the age and health profile of an area.
Why turnout in 92242 looks the way it does
Turnout in 92242 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.