1 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Columbia | 1 | 6,419 | 6,763 | -0.88% | 578 | 11 | City |
Columbia is the largest city in Marion County, with a population of 6,419.
Columbia is the smallest city in Marion County, with a population of 6,419.
There is 1 city in Marion County, Mississippi.