San Gabriel leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 48% of adults in San Gabriel typically vote, below the U.S. average of about 62%. Among adults in San Gabriel, ~29% vote Democratic, ~19% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How San Gabriel compares
Among cities within 25 miles, San Gabriel leans more Democratic than 47 of 139 neighbors.
Politically, San Gabriel sits close to the rest of California.
Politics vary noticeably by neighborhood within San Gabriel. The northwest side is the most Democratic-leaning (D+29) and the southwest side is the least Democratic-leaning (D+14), a spread of about 15 points.
Why San Gabriel leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for San Gabriel, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in San Gabriel live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and San Gabriel sits in the top quarter (about 39%, above 87% of cities). A high never-married share predicts Democratic voting, and about 35% of adults in San Gabriel have never been married, above 88% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; San Gabriel, CA sits in the top tenth nationally on this measure.
Why turnout in San Gabriel looks the way it does
Renters vote less often than owners. About 49% of households in San Gabriel rent, about 24 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 10% of homes in San Gabriel have more than one occupant per room, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- San Marino, CA D+21
- Temple City, CA D+13
- Rosemead, CA D+17
- Alhambra, CA D+28
- East Pasadena, CA D+33
- Arcadia, CA D+14
- South Pasadena, CA D+52
- Monterey Park, CA D+21
- South El Monte, CA D+28
- El Monte, CA D+26
Cities with Similar Populations
- Levittown, PA R+2
- Davenport, FL R+6
- Kirkland, WA D+45
- Howell, MI R+24
- Fountainebleau, FL R+30
- Novato, CA D+34
- Mentor, OH R+13
- Monterey Park, CA D+21
- Newport Beach, CA R+12
- North Bergen, NJ D+6
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.