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

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

International leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.

 

About 19% of adults in International typically vote, below the U.S. average of about 62%. Among adults in International, ~12% vote Democratic, ~7% Republican, and ~81% don't vote. The map below shows estimated turnout by block group.

How International compares

Among neighborhoods within 5 miles, International leans more Democratic than 34 of 38 neighbors.

International runs about 8 points more Democratic than California as a whole.

Politics vary noticeably by block within International. The northwest side is the most Democratic-leaning (D+38) and the south side is the least Democratic-leaning (D+17), a spread of about 21 points.

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

Dense areas vote Democratic. More than 99% of residents in International live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 53% of adults in International have never been married, above 87% of neighborhoods.

Cancer-screening access and voter turnout

Places with low colon-cancer-screening access tend to turn out at a lower rate; International, 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 International looks the way it does

Areas with limited routine healthcare access turn out at lower rates. International 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 33%, about 29 points below the California average of 62%. Renters vote less often than owners, and about 82% of households in International rent, compared to around 62% in nearby neighborhoods. High food insecurity lines up with lower turnout, and about 49% of adults in International report food insecurity, above 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.