Pacific-Riverside, San Bernardino, CA Political Map | Democrat & Republican Areas in Pacific-Riverside

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

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

 

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

How Pacific-Riverside compares

Among neighborhoods within 5 miles, Pacific-Riverside leans more Democratic than 19 of 36 neighbors.

Politically, Pacific-Riverside sits close to the rest of California.

Politics vary noticeably by block within Pacific-Riverside. The northwest side is the most Democratic-leaning (D+26) and the northeast side is the least Democratic-leaning (D+15), a spread of about 11 points.

Why Pacific-Riverside 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 Pacific-Riverside, not a ranked or complete list of what matters most.

Areas with many never-married adults vote Democratic. About 52% of adults in Pacific-Riverside have never been married, modestly above similar-sized neighborhoods (around 44%). Density combined with diversity predicts Democratic voting, and non-Hispanic white share in Pacific-Riverside is about 16%, about 56 points below the U.S. average of 72%.

Cancer-screening access and voter turnout

Places with low colon-cancer-screening access tend to turn out at a lower rate; Pacific-Riverside, San Bernardino, CA sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Pacific-Riverside looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Pacific-Riverside 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 41%, about 21 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 41% of adults in Pacific-Riverside report food insecurity, above 94% of neighborhoods. Low high-school completion lines up with lower turnout, and about 60% of adults in Pacific-Riverside have completed high school, below 98% 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.