Muscoy, San Bernardino, CA Political Map | Democrat & Republican Areas in Muscoy

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

Muscoy leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.

 

About 33% of adults in Muscoy typically vote, below the U.S. average of about 62%. Among adults in Muscoy, ~20% vote Democratic, ~13% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.

How Muscoy compares

Among neighborhoods within 5 miles, Muscoy leans more Democratic than 13 of 28 neighbors.

Politically, Muscoy sits close to the rest of California.

Politics vary noticeably by block within Muscoy. The south side is the most Democratic-leaning (D+27) and the north side is the least Democratic-leaning (D+9), a spread of about 18 points.

Why Muscoy leans the way it does

This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Muscoy, not a ranked or complete list of what matters most.

Areas with many never-married adults vote Democratic. About 49% of adults in Muscoy have never been married, modestly above similar-sized neighborhoods (around 38%).

High-school completion, uninsured rate, and voter turnout

Places that combine low high-school-completion share and a high uninsured rate tend to turn out at a lower rate, as Muscoy, San Bernardino, CA does.

Why turnout in Muscoy looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Muscoy is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 40%, about 22 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 43% of adults in Muscoy report food insecurity, above 95% of neighborhoods. Low high-school completion lines up with lower turnout, and about 56% of adults in Muscoy have completed high school, in the bottom fraction of neighborhoods. 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.