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

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

Colton leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.

 

About 40% of adults in Colton typically vote, below the U.S. average of about 62%. Among adults in Colton, ~24% vote Democratic, ~16% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.

How Colton compares

Among cities within 25 miles, Colton leans more Democratic than 66 of 71 neighbors.

Politically, Colton sits close to the rest of California.

Politics vary noticeably by neighborhood within Colton. The south side runs the most Democratic (D+28) and the southwest side runs the most Republican (R+6), a spread of about 33 points.

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

Dense areas vote Democratic. About 92% of residents in Colton live in densely developed areas, about 56 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in Colton have never been married, above 96% of cities.

Population density and Democratic lean

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

Why turnout in Colton looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Colton is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 43% of households in Colton rent, about 19 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 29% of adults in Colton report food insecurity, above 95% 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.