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

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

Allendale is a Democratic stronghold. About 77% of voters here vote Democratic and 23% Republican.

 

About 68% of adults in Allendale typically vote, above the U.S. average of about 62%. Among adults in Allendale, ~53% vote Democratic, ~16% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.

How Allendale compares

Among cities within 25 miles, Allendale is the most Democratic-leaning.

Allendale runs about 71 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while Allendale is one of the few Democratic-leaning pockets.

Politics vary noticeably by neighborhood within Allendale. The south side is the most Democratic-leaning (D+65) and the northeast side is the least Democratic-leaning (D+30), a spread of about 35 points.

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

Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Allendale is about 14%, about 58 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 39% of adults in Allendale have never been married, above 93% of cities. Allendale runs against the grain of South Carolina, a Democratic-leaning pocket in a Republican-leaning state.

Preventive-care access and voter turnout

Places with limited routine preventive-care access tend to turn out at a lower rate; Allendale, SC 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 Allendale looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Allendale 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 49%, about 10 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.