Aiken leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 77% of adults in Aiken typically vote, above the U.S. average of about 62%. Among adults in Aiken, ~31% vote Democratic, ~46% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Aiken compares
Among cities within 25 miles, Aiken leans more Republican than 12 of 38 neighbors.
Politically, Aiken sits close to the rest of South Carolina.
Politics vary noticeably by neighborhood within Aiken. The north side runs the most Democratic (D+49) and the southeast side runs the most Republican (R+40), a spread of about 89 points.
Why Aiken 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 Aiken, not a ranked or complete list of what matters most.
Aiken votes Republican even though it is densely developed (about 54%, well above the South Carolina average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Aiken, SC sits in the top quarter nationally 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 Aiken looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Aiken is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 63%, above 58% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Foxtown, SC R+4
- Warrenville, SC R+47
- Ridgecrest, SC R+26
- Montmorenci, SC R+37
- Gloverville, SC R+50
- Vaucluse, SC R+10
- Langley, SC R+33
- Graniteville, SC R+13
- New Ellenton, SC R+21
- Oakwood, SC R+55
Cities with Similar Populations
- Biloxi, MS R+21
- Malden, MA D+39
- Grants Pass, OR R+24
- San Pablo, CA D+48
- Clermont, FL R+16
- Powder Springs, GA D+26
- Brentwood, CA D+7
- Harrisonburg, VA D+7
- DeLand, FL R+19
- Wyoming, MI D+12
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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.