Blossom Valley leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 59% of adults in Blossom Valley typically vote, near the U.S. average of about 62%. Among adults in Blossom Valley, ~37% vote Democratic, ~22% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How Blossom Valley compares
Among neighborhoods within 5 miles, Blossom Valley leans more Democratic than 1 of 8 neighbors.
Blossom Valley runs about 5 points more Democratic than California as a whole.
Why Blossom Valley leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Blossom Valley. The lean here lands roughly where demographic data alone would predict.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Blossom Valley, San Jose, CA sits in the top tenth nationally on this measure.
Why turnout in Blossom Valley looks the way it does
Crowded housing lines up with lower turnout. About 6% of homes in Blossom Valley have more than one occupant per room, above 82% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Edenvale-Seven Trees, San Jose, CA D+28
- Garden-Villa Montery, San Jose, CA D+33
- Santa Teresa, San Jose, CA D+26
- Almaden Valley, San Jose, CA D+27
- Cambrian Park, San Jose, CA D+28
- Alma, San Jose, CA D+36
- Willow Glen, San Jose, CA D+37
- Evergreen, San Jose, CA D+22
- East San Jose, San Jose, CA D+27
- Naglee Park, San Jose, CA D+53
Neighborhoods with Similar Populations
- Austin, Chicago, IL D+74
- Mira Mesa, San Diego, CA D+21
- Highbridge, Bronx, NY D+41
- Millcreek, Salt Lake City, UT D+34
- Downtown Miami, Miami, FL D+6
- Allston-Brighton, Brighton, MA D+63
- Forest Hills, Queens, NY D+20
- Chelsea, Manhattan, NY D+65
- Far North Dallas-Keller, Keller, TX R+16
- Central Mesa, Mesa, AZ R+6
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.