Marion County, South Carolina Cities (2025)

3 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Marion15,9936,368-1.24%1,3394 City
Mullins23,8054,009-1.07%1,1913 City
Sellers31461460%2181 Town

Marion County Cities Summary

Largest City

Marion is the largest city in Marion County, with a population of 5,993.

Smallest City

Sellers is the smallest city in Marion County, with a population of 146.

10 Largest Cities

There are 3 cities in Marion County, South Carolina.

Location of Marion County