Mountain View San Diego leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 36% of adults in Mountain View San Diego typically vote, below the U.S. average of about 62%. Among adults in Mountain View San Diego, ~24% vote Democratic, ~12% Republican, and ~64% don't vote. The map below shows estimated turnout by block group.
How Mountain View San Diego compares
Among neighborhoods within 5 miles, Mountain View San Diego leans more Democratic than 11 of 38 neighbors.
Mountain View San Diego runs about 12 points more Democratic than California as a whole.
Why Mountain View San Diego 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 Mountain View San Diego, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Mountain View San Diego live in densely developed areas, about 64 points above the U.S. average of 36%.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Mountain View San Diego, San Diego, CA does.
Why turnout in Mountain View San Diego looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Mountain View San Diego is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 47%, about 15 points below the California average of 62%. Renters vote less often than owners, and about 67% of households in Mountain View San Diego rent, about 42 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 36% of adults in Mountain View San Diego report food insecurity, above 90% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Southcrest, San Diego, CA D+31
- Mount Hope, San Diego, CA D+35
- Lincoln Park, San Diego, CA D+40
- Bario Logan, San Diego, CA D+39
- Chollas View, San Diego, CA D+37
- Grant Hill, San Diego, CA D+42
- Valencia Park, San Diego, CA D+45
- Emerald Hills, San Diego, CA D+45
- Ridgeview-Webster, San Diego, CA D+37
- Alta Vista, San Diego, CA D+20
Neighborhoods with Similar Populations
- Russian Hill, San Francisco, CA D+68
- Koolauloa, Laie, HI D+17
- Mountain View, Bend, OR D+14
- Woodlawn, Bronx, NY D+26
- Dupont Circle, Washington, DC D+78
- Old Aurora, New Orleans, LA D+56
- South Broadway, Cleveland, OH D+53
- Old Fourth Ward, Atlanta, GA D+59
- West Side, St. Paul, MN D+46
- Kenmore, Akron, OH D+10
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.