| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hattiesburg | 1 | 48,808 | 48,741 | 0.01% | 913 | 53 | City |
| Petal | 2 | 11,825 | 11,067 | 1.12% | 699 | 17 | City |
Hattiesburg is the largest city in Forrest County, with a population of 48,808.
Petal is the smallest city in Forrest County, with a population of 11,825.
There are 2 cities in Forrest County, Mississippi.