Willow Glen, San Jose, CA Political Map | Democrat & Republican Areas in Willow Glen

By the BestNeighborhood data science team. Last updated May 2026.

Willow Glen leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.

 

About 62% of adults in Willow Glen typically vote, near the U.S. average of about 62%. Among adults in Willow Glen, ~42% vote Democratic, ~20% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.

How Willow Glen compares

Among neighborhoods within 5 miles, Willow Glen leans more Democratic than 8 of 12 neighbors.

Willow Glen runs about 17 points more Democratic than California as a whole.

Politics vary noticeably by block within Willow Glen. The north side is the most Democratic-leaning (D+49) and the southeast side is the least Democratic-leaning (D+31), a spread of about 18 points.

Why Willow Glen 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 Willow Glen, not a ranked or complete list of what matters most.

Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Willow Glen is about 41%, about 31 points below the U.S. average of 72%.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Willow Glen, San Jose, CA sits in the top quarter 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 Willow Glen looks the way it does

Turnout in Willow Glen sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.

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.