Stevenson Ranch, CA Political Map | Democrat & Republican Areas in Stevenson Ranch

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

Stevenson Ranch leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.

 

About 59% of adults in Stevenson Ranch typically vote, near the U.S. average of about 62%. Among adults in Stevenson Ranch, ~31% vote Democratic, ~28% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.

How Stevenson Ranch compares

Among cities within 25 miles, Stevenson Ranch leans more Democratic than 18 of 61 neighbors.

Stevenson Ranch runs about 15 points more Republican than California as a whole.

Politics vary noticeably by neighborhood within Stevenson Ranch. The east side runs the most Democratic (D+12) and the southwest side runs the most Republican (R+9), a spread of about 22 points.

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

Areas with high college attainment vote Democratic. About 60% of adults in Stevenson Ranch hold a bachelor's degree, about 31 points above the U.S. average of 28%. Dense areas vote Democratic, and Stevenson Ranch sits in the top fifth on density (about 60%, above 90% of cities).

Population density and Democratic lean

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

Why turnout in Stevenson Ranch looks the way it does

Renters vote less often than owners. About 34% of households in Stevenson Ranch rent, about 9 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and Stevenson Ranch sits in the top quarter on routine-care measures. 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.