Lexington County leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 74% of adults in Lexington County typically vote, above the U.S. average of about 62%. Among adults in Lexington County, ~26% vote Democratic, ~48% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Lexington County compares
Among counties within 50 miles, Lexington County leans more Republican than 10 of 12 neighbors.
Lexington County runs about 12 points more Republican than South Carolina as a whole.
Politics vary noticeably by city within Lexington County. The northeast side runs the most Democratic (D+6) and the southwest side runs the most Republican (R+49), a spread of about 55 points.
Why Lexington County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Lexington County, not a ranked or complete list of what matters most.
Lexington County votes Republican even though it is densely developed (about 56%, far above the South Carolina average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Lexington County, SC sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Lexington County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Lexington County 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 68% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Richland County, SC D+38
- Saluda County, SC R+34
- Fairfield County, SC D+13
- Newberry County, SC R+22
- Calhoun County, SC R+15
- Kershaw County, SC R+32
- Orangeburg County, SC D+28
- Aiken County, SC R+24
- Edgefield County, SC R+23
- Barnwell County, SC R+13
Counties with Similar Populations
- Thurston County, WA D+19
- Chatham County, GA D+26
- Cleveland County, OK R+14
- Leon County, FL D+26
- Dutchess County, NY D+8
- Ottawa County, MI R+16
- Anchorage Municipality, AK D+20
- Clayton County, GA D+68
- Greene County, MO R+18
- St. Louis City, MO D+65
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.