Riverdale, SC Political Map | Democrat & Republican Areas in Riverdale

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

Riverdale is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.

 

About 63% of adults in Riverdale typically vote, near the U.S. average of about 62%. Among adults in Riverdale, ~31% vote Democratic, ~32% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.

How Riverdale compares

Among cities within 25 miles, Riverdale sits roughly in the middle of the political spectrum, with 39 neighbors leaning further in the place's direction and 13 leaning the other way.

Riverdale runs about 18 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while Riverdale sits closer to the political middle.

Politics vary noticeably by neighborhood within Riverdale. The south side runs the most Democratic (D+35) and the southwest side runs the most Republican (R+70), a spread of about 104 points.

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

Riverdale votes against the grain of South Carolina. South Carolina leans Republican overall, while Riverdale runs about 18 points more Democratic.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Riverdale, SC sits above the national average on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Riverdale looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Riverdale 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 48%, about 11 points below the South Carolina average of 58%. 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 South Carolina State Election Commission, 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.