Mountain View leans heavily Democratic by roughly 46 points: about 73% of voters vote Democratic and 27% Republican.
About 58% of adults in Mountain View typically vote, near the U.S. average of about 62%. Among adults in Mountain View, ~42% vote Democratic, ~16% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How Mountain View compares
Among cities within 25 miles, Mountain View leans more Democratic than 43 of 67 neighbors.
Mountain View runs about 25 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Mountain View. The west side is the most Democratic-leaning (D+49) and the northeast side is the least Democratic-leaning (D+35), a spread of about 14 points.
Why Mountain View 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 Mountain View, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 74% of adults in Mountain View hold a bachelor's degree, about 46 points above the U.S. average of 28%. Dense areas vote Democratic, and Mountain View sits in the top fifth on density (more than 99%, in the top fraction of cities). A high never-married share predicts Democratic voting, and about 39% of adults in Mountain View have never been married, above 92% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Mountain View, CA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Mountain View looks the way it does
Renters vote less often than owners. About 60% of households in Mountain View rent, about 35 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 7% of homes in Mountain View have more than one occupant per room, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Los Altos, CA D+40
- Los Altos Hills, CA D+23
- Sunnyvale, CA D+36
- Palo Alto, CA D+52
- Stanford, CA D+64
- Cupertino, CA D+31
- East Palo Alto, CA D+49
- Alviso, CA D+24
- Santa Clara, CA D+35
- Menlo Park, CA D+64
Cities with Similar Populations
- Bloomington, IL D+11
- Westland, MI D+15
- Littleton, CO D+17
- Mission Viejo, CA R+3
- Madera, CA Even
- Springdale, AR R+7
- Cicero, IL D+34
- Somerville, MA D+69
- Terre Haute, IN R+6
- Johns Creek, GA D+9
All Local Stats
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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.