3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bay St. Louis | 1 | 10,798 | 9,436 | 2.58% | 735 | 15 | City |
| Diamondhead | 2 | 9,361 | 9,510 | -0.32% | 926 | 10 | City |
| Waveland | 3 | 7,004 | 7,198 | -0.55% | 825 | 8 | City |
Bay St. Louis is the largest city in Hancock County, with a population of 10,798.
Waveland is the smallest city in Hancock County, with a population of 7,004.
There are 3 cities in Hancock County, Mississippi.