Granite Bay, CA Political Map | Democrat & Republican Areas in Granite Bay

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

Granite Bay leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.

 

About 84% of adults in Granite Bay typically vote, above the U.S. average of about 62%. Among adults in Granite Bay, ~37% vote Democratic, ~47% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.

How Granite Bay compares

Among cities within 25 miles, Granite Bay leans more Republican than 24 of 65 neighbors.

Granite Bay runs about 32 points more Republican than California as a whole. California leans Democratic overall, while Granite Bay is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within Granite Bay. The north side is the most Republican-leaning (R+18) and the southwest side is the least Republican-leaning (R+5), a spread of about 13 points.

Why Granite Bay 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 Granite Bay, not a ranked or complete list of what matters most.

Granite Bay votes Republican even though it is densely developed (about 82%, well above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 82% of households in Granite Bay are family households, above 94% of cities. Granite Bay runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.

Food insecurity and voter turnout

Places with low food insecurity tend to turn out at a higher rate; Granite Bay, CA sits in the bottom tenth nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.

Why turnout in Granite Bay looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Granite Bay 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 75%, about 15 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Granite Bay have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.