8 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 |
| Hide-A-Way Lake | 4 | 2,278 | 2,217 | 1.24% | 1,507 | 2 | CDP |
| Kiln | 5 | 2,135 | 2,462 | -0.33% | 162 | 13 | CDP |
| DeLisle | 6 | 1,692 | 1,601 | 2.17% | 323 | 5 | CDP |
| Pearlington | 7 | 671 | 803 | -6.15% | 74 | 9 | CDP |
| Henderson Point | 8 | 221 | 276 | 1.38% | 208 | 1 | CDP |
Bay St. Louis is the largest city in Hancock County, with a population of 10,798.
Henderson Point is the smallest city in Hancock County, with a population of 221.
There are 8 cities in Hancock County, Mississippi.