| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Benton | 1 | 4,706 | 4,764 | -0.25% | 925 | 5 | City |
| Calvert City | 2 | 2,509 | 2,517 | -0.04% | 140 | 18 | City |
| Hardin | 3 | 581 | 581 | 0% | 829 | 1 | City |
Benton is the largest city in Marshall County, with a population of 4,706.
Hardin is the smallest city in Marshall County, with a population of 581.
There are 3 cities in Marshall County, Kentucky.