Lancaster leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 72% of adults in Lancaster typically vote, above the U.S. average of about 62%. Among adults in Lancaster, ~30% vote Democratic, ~42% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Lancaster compares
Among cities within 25 miles, Lancaster leans more Republican than 11 of 52 neighbors.
Politically, Lancaster sits close to the rest of South Carolina.
Politics vary noticeably by neighborhood within Lancaster. The south side runs the most Democratic (D+3) and the northeast side runs the most Republican (R+62), a spread of about 65 points.
Why Lancaster 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 Lancaster, not a ranked or complete list of what matters most.
Lancaster votes Republican even though it is densely developed (about 38%, modestly above the South Carolina average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Lancaster, SC sits in the top quarter nationally on this measure.
Why turnout in Lancaster looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Lancaster is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Riverside, SC R+26
- Caskey, SC R+18
- Grace, SC R+20
- Jones Crossroads, SC R+30
- Rowell, SC R+32
- Landsford, SC R+53
- Fort Lawn, SC R+33
- Heath Springs, SC R+41
- Primus, SC R+71
Cities with Similar Populations
- Fairfield, OH R+10
- Bartlett, TN R+16
- Prattville, AL R+36
- Woodland Hills, CA D+23
- Owasso, OK R+25
- Alvin, TX R+42
- Middletown, DE D+16
- West Orange, NJ D+51
- North Lauderdale, FL D+51
- Lake Mary, FL R+9
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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.