Belvedere-Tiburon, CA Political Map | Democrat & Republican Areas in Belvedere-Tiburon

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

Belvedere-Tiburon leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.

 

About 77% of adults in Belvedere-Tiburon typically vote, above the U.S. average of about 62%. Among adults in Belvedere-Tiburon, ~55% vote Democratic, ~22% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.

How Belvedere-Tiburon compares

Among cities within 25 miles, Belvedere-Tiburon leans more Democratic than 26 of 76 neighbors.

Belvedere-Tiburon runs about 22 points more Democratic than California as a whole.

Why Belvedere-Tiburon 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 Belvedere-Tiburon, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 81% of adults in Belvedere-Tiburon hold a bachelor's degree, about 53 points above the U.S. average of 28%. Dense areas vote Democratic, and Belvedere-Tiburon sits in the top fifth on density (about 39%, above 84% of cities).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Belvedere-Tiburon, 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 Belvedere-Tiburon looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Belvedere-Tiburon is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 78%, about 18 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in Belvedere-Tiburon have completed high school, in the top fraction of cities. 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.