San Andreas leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 35% of adults in San Andreas typically vote, below the U.S. average of about 62%. Among adults in San Andreas, ~20% vote Democratic, ~15% Republican, and ~65% don't vote. The map below shows estimated turnout by block group.
How San Andreas compares
Among neighborhoods within 5 miles, San Andreas leans more Democratic than 7 of 24 neighbors.
San Andreas runs about 7 points more Republican than California as a whole.
Politics vary noticeably by block within San Andreas. The north side is the most Democratic-leaning (D+25) and the southeast side is the least Democratic-leaning (D+5), a spread of about 21 points.
Why San Andreas leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for San Andreas, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 57% of adults in San Andreas have never been married, modestly above similar-sized neighborhoods (around 46%).
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; San Andreas, Highland, CA sits below the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in San Andreas looks the way it does
Areas with limited routine healthcare access turn out at lower rates. San Andreas is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 66% of households in San Andreas rent, compared to around 49% in nearby neighborhoods. High food insecurity lines up with lower turnout, and about 29% of adults in San Andreas report food insecurity, above 81% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Cypress-Riverside, Highland, CA D+13
- San Gorgonio, Highland, CA D+22
- Crossroads, Highland, CA R+5
- Lankershim, Highland, CA D+22
- Belevedere, San Bernardino, CA R+3
- NE-Sterling, San Bernardino, CA D+21
- Pacific-Riverside, San Bernardino, CA D+21
- Curtis, Highland, CA D+22
- Drnag, San Bernardino, CA D+13
- East Valley, San Bernardino, CA D+25
Neighborhoods with Similar Populations
- Columbia Street Waterfront District, Brooklyn, NY D+78
- Cumberland, Atlanta, GA D+43
- Polonia, Milwaukee, WI D+32
- South Main, Houston, TX D+60
- Hamilton Main Street Historic District, Hamilton, OH R+14
- Seward, Minneapolis, MN D+78
- Bricktown, Chicago, IL D+64
- Bryn Mawr, Yonkers, NY D+6
- Venable, Charlottesville, VA D+59
- Walnut Grove, Broomfield, CO D+15
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.