8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bay St. Louis | 1 | 11,229 | 9,434 | 3.3% | 764 | 14.69 | City |
| Diamondhead | 2 | 9,055 | 9,507 | -0.98% | 896 | 10.11 | City |
| Waveland | 3 | 6,852 | 7,196 | -1% | 807 | 8.49 | City |
| Hide-A-Way Lake | 4 | 2,278 | 2,217 | 1.24% | 1,507 | 1.51 | CDP |
| Kiln | 5 | 2,135 | 2,462 | -0.33% | 162 | 13.16 | CDP |
| DeLisle | 6 | 1,692 | 1,601 | 2.17% | 323 | 5.23 | CDP |
| Pearlington | 7 | 671 | 803 | -6.15% | 74 | 9.13 | CDP |
| Henderson Point | 8 | 221 | 276 | 1.38% | 208 | 1.06 | CDP |
Bay St. Louis is the largest city in Hancock County, with a population of 11,229.
Henderson Point is the smallest city in Hancock County.
There are 8 cities in Hancock County, Mississippi.