San Miguel Ranch leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 54% of adults in San Miguel Ranch typically vote, below the U.S. average of about 62%. Among adults in San Miguel Ranch, ~30% vote Democratic, ~24% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How San Miguel Ranch compares
Among neighborhoods within 5 miles, San Miguel Ranch leans more Democratic than 2 of 16 neighbors.
San Miguel Ranch runs about 9 points more Republican than California as a whole.
Politics vary noticeably by block within San Miguel Ranch. The east side runs the most Democratic (D+19) and the west side runs the most Republican (R+5), a spread of about 23 points.
Why San Miguel Ranch 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 Miguel Ranch, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 58% of adults in San Miguel Ranch hold a bachelor's degree, about 29 points above the U.S. average of 28%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; San Miguel Ranch, Chula Vista, CA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in San Miguel Ranch looks the way it does
Turnout in San Miguel Ranch 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 Neighborhoods
- East Lake, Chula Vista, CA D+16
- Rolling Hills Ranch, Chula Vista, CA D+9
- Bonita Long Canyon, Bonita, CA D+7
- Estlake Greens, Chula Vista, CA D+17
- Eastlake Trails, Chula Vista, CA D+15
- Rancho del Rey, Chula Vista, CA D+15
- Eastlake Vistas, Chula Vista, CA D+19
- Paseo Ranchoero, Chula Vista, CA D+16
- Otay Ranch, Chula Vista, CA D+16
- Bay Terraces, San Diego, CA D+20
Neighborhoods with Similar Populations
- Eberwhite, Ann Arbor, MI D+79
- Artisan, Bakersfield, CA R+6
- Ridgewood, Springfield, OH R+4
- Homeland, Baltimore, MD D+67
- Highland Park, Birmingham, AL D+36
- Aurora-Butteville-Barlow, Canby, OR D+14
- Happy Hollow, Valley Falls, RI Even
- Gentilly Woods, New Orleans, LA D+73
- South Plaza, Kansas City, MO D+51
- Riverview Park, Tulsa, OK D+41
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.