Walnut, CA Political Map | Democrat & Republican Areas in Walnut

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

Walnut leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 66% of adults in Walnut typically vote, near the U.S. average of about 62%. Among adults in Walnut, ~36% vote Democratic, ~30% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.

How Walnut compares

Among cities within 25 miles, Walnut leans more Democratic than 39 of 115 neighbors.

Walnut runs about 10 points more Republican than California as a whole.

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

Dense areas vote Democratic. About 93% of residents in Walnut live in densely developed areas, about 57 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Walnut sits in the top quarter (about 55%, above 95% of cities).

Population density and Democratic lean

Places with high population density tend to lean Democratic; Walnut, CA sits in the top tenth nationally on this measure.

Why turnout in Walnut looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Walnut 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 68%, about 8 points above the U.S. average of 60%. 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.