15 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Thomas | 1 | 16,662 | 17,418 | -0.75% | 2,937 | 6 | City |
| Newport | 2 | 13,614 | 14,147 | -0.65% | 4,936 | 3 | City |
| Alexandria | 3 | 11,042 | 10,373 | 1.02% | 1,595 | 7 | City |
| Cold Spring | 4 | 6,636 | 6,225 | 1.05% | 1,398 | 5 | City |
| Highland Heights | 5 | 6,109 | 6,657 | -1.47% | 2,332 | 3 | City |
| Dayton | 6 | 5,950 | 5,662 | 0.81% | 4,580 | 1 | City |
| Bellevue | 7 | 5,832 | 5,549 | 0.81% | 6,444 | 1 | City |
| Southgate | 8 | 3,877 | 3,652 | 0.99% | 2,659 | 1 | City |
| Wilder | 9 | 3,050 | 3,173 | -0.65% | 845 | 4 | City |
| Silver Grove | 10 | 1,235 | 1,162 | 0.98% | 1,093 | 1 | City |
| Melbourne | 11 | 480 | 456 | 0.84% | 575 | 1 | City |
| Crestview | 12 | 473 | 449 | 0.85% | 2,994 | 0 | City |
| Mentor | 13 | 232 | 216 | 1.31% | 311 | 1 | City |
| Woodlawn | 14 | 229 | 220 | 0.88% | 3,881 | 0 | City |
| California | 15 | 87 | 81 | 1.16% | 395 | 0 | City |
Fort Thomas is the largest city in Campbell County, with a population of 16,662.
California is the smallest city in Campbell County, with a population of 87.
There are 15 cities in Campbell County, Kentucky.