San Miguel leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 56% of adults in San Miguel typically vote, below the U.S. average of about 62%. Among adults in San Miguel, ~38% vote Democratic, ~18% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How San Miguel compares
Among neighborhoods within 5 miles, San Miguel leans more Democratic than 3 of 16 neighbors.
San Miguel runs about 15 points more Democratic than California as a whole.
Why San Miguel 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, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in San Miguel live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and San Miguel sits in the top quarter (about 59%, above 79% of neighborhoods).
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; San Miguel, Sunnyvale, 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 San Miguel looks the way it does
Crowded housing lines up with lower turnout. About 11% of homes in San Miguel have more than one occupant per room, above 93% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Snail, Sunnyvale, CA D+33
- Lakewood, Sunnyvale, CA D+30
- Lowlanders, Sunnyvale, CA D+42
- Heritage District, Sunnyvale, CA D+43
- Ponderosa Park, Sunnyvale, CA D+34
- Sunnyvale West, Sunnyvale, CA D+37
- Whisman Station, Mountain View, CA D+45
- North Whisman, Mountain View, CA D+39
- Birdland Neighbors, Sunnyvale, CA D+36
- Martens-Carmelita, Mountain View, CA D+38
Neighborhoods with Similar Populations
- Fourth Street Historic District, Massillon, OH R+6
- Central Oak Park, Sacramento, CA D+57
- Huguenot, Richmond, VA D+21
- Las Vistas, Tucson, AZ D+44
- Nassau Shores, East Massapequa, NY R+33
- Stephens, Little Rock, AR D+71
- Foothills, Lakewood, CO D+26
- Redwood Heights, Oakland, CA D+74
- Tufts, Somerville, MA D+71
- Fair Oaks, North Fair Oaks, CA D+54
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.