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

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

East Valley leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 29% of adults in East Valley typically vote, below the U.S. average of about 62%. Among adults in East Valley, ~18% vote Democratic, ~11% Republican, and ~71% don't vote. The map below shows estimated turnout by block group.

How East Valley compares

Among neighborhoods within 5 miles, East Valley leans more Democratic than 29 of 39 neighbors.

East Valley runs about 5 points more Democratic than California as a whole.

Politics vary noticeably by block within East Valley. The southwest side is the most Democratic-leaning (D+38) and the southeast side is the least Democratic-leaning (D+23), a spread of about 14 points.

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

Areas with many never-married adults vote Democratic. About 57% of adults in East Valley have never been married, modestly above similar-sized neighborhoods (around 48%).

Preventive-care access and voter turnout

Places with limited routine preventive-care access tend to turn out at a lower rate; East Valley, San Bernardino, CA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in East Valley looks the way it does

Areas with limited routine healthcare access turn out at lower rates. East Valley 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 37%, about 25 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 51% of adults in East Valley report food insecurity, in the top fraction of neighborhoods. Low high-school completion lines up with lower turnout, and about 54% of adults in East Valley 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.