3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bay St. Louis | 1 | 11,071 | 9,436 | 2.53% | 754 | 15 | City |
| Diamondhead | 2 | 9,331 | 9,510 | -0.32% | 923 | 10 | City |
| Waveland | 3 | 6,965 | 7,198 | -0.56% | 820 | 8 | City |
Bay St. Louis is the largest city in Hancock County, with a population of 11,071.
Waveland is the smallest city in Hancock County, with a population of 6,965.
There are 3 cities in Hancock County, Mississippi.