Heritage District leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 45% of adults in Heritage District typically vote, below the U.S. average of about 62%. Among adults in Heritage District, ~32% vote Democratic, ~13% Republican, and ~55% don't vote. The map below shows estimated turnout by block group.
How Heritage District compares
Among neighborhoods within 5 miles, Heritage District leans more Democratic than 13 of 19 neighbors.
Heritage District runs about 23 points more Democratic than California as a whole.
Politics vary noticeably by block within Heritage District. The west side is the most Democratic-leaning (D+51) and the southeast side is the least Democratic-leaning (D+37), a spread of about 13 points.
Why Heritage District 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 Heritage District, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Heritage District live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Heritage District sits in the top quarter (about 70%, above 91% of neighborhoods).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Heritage District, Sunnyvale, 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 Heritage District looks the way it does
Renters vote less often than owners. About 80% of households in Heritage District rent, about 55 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Heritage District sits in the top quarter on routine-care measures. Crowded housing lines up with lower turnout, and about 8% of homes in Heritage District have more than one occupant per room, above 86% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Lowlanders, Sunnyvale, CA D+42
- Sunnyvale West, Sunnyvale, CA D+37
- Snail, Sunnyvale, CA D+33
- San Miguel, Sunnyvale, CA D+35
- Ponderosa Park, Sunnyvale, CA D+34
- Whisman Station, Mountain View, CA D+45
- Lakewood, Sunnyvale, CA D+30
- Martens-Carmelita, Mountain View, CA D+38
- Birdland Neighbors, Sunnyvale, CA D+36
- North Whisman, Mountain View, CA D+39
Neighborhoods with Similar Populations
- Townsite, Oceanside, CA D+31
- Litte Italy, Niagara Falls, NY D+26
- New North End, Burlington, VT D+47
- Seventh Ward, New Orleans, LA D+78
- Independence Heights, Houston, TX D+53
- Belltown, Seattle, WA D+62
- Falls of Neuse, Raleigh, NC D+31
- Downtown, Las Vegas, NV D+39
- Mid-Cambridge, Cambridge, MA D+77
- Brays Oaks, Houston, TX D+42
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.