Sundale leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 44% of adults in Sundale typically vote, below the U.S. average of about 62%. Among adults in Sundale, ~29% vote Democratic, ~15% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How Sundale compares
Among neighborhoods within 5 miles, Sundale leans more Democratic than 1 of 4 neighbors.
Sundale runs about 13 points more Democratic than California as a whole.
Politics vary noticeably by block within Sundale. The east side is the most Democratic-leaning (D+37) and the southwest side is the least Democratic-leaning (D+26), a spread of about 11 points.
Why Sundale 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 Sundale, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Sundale live in densely developed areas, about 64 points above the U.S. average of 36%.
Population density, never-married share, and Democratic lean
Places that combine high population density and a low never-married share tend to lean Democratic, as Sundale, Fremont, CA does.
Why turnout in Sundale looks the way it does
Crowded housing lines up with lower turnout. About 17% of homes in Sundale have more than one occupant per room, above 97% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Downtown Fremont, Fremont, CA D+37
- Parkmont, Fremont, CA D+36
- Niles Junction, Fremont, CA D+31
- Ardenwood, Fremont, CA D+36
- Contempo, Union City, CA D+30
- Fairway Park, Hayward, CA D+36
- Mission-Garin, Hayward, CA D+43
- Tennyson-Alquire, Hayward, CA D+35
- Glen Eden, Hayward, CA D+33
- Harder-Tennyson, Hayward, CA D+37
Neighborhoods with Similar Populations
- Side Hill, Fort Collins, CO D+32
- Groves Lincoln Park, Tucson, AZ Even
- Mahncke Park, San Antonio, TX D+33
- Hampton Cove, Owens Cross Roads, AL R+37
- Countryside Woods, Vancouver, WA D+13
- Lookout Valley, Chattanooga, TN R+38
- Downtown Berkeley, Berkeley, CA D+76
- Ventura, San Antonio, TX D+22
- Collins Gardens, San Antonio, TX D+36
- Barnum, Denver, CO D+51
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.