16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Thomas | 1 | 16,673 | 17,423 | -0.89% | 2,938 | 5.67 | City |
| Newport | 2 | 13,588 | 14,147 | -0.82% | 4,927 | 2.76 | City |
| Alexandria | 3 | 10,878 | 10,365 | 0.96% | 1,571 | 6.92 | City |
| Highland Heights | 4 | 6,583 | 6,655 | -0.21% | 2,513 | 2.62 | City |
| Cold Spring | 5 | 6,540 | 6,225 | 0.97% | 1,378 | 4.75 | City |
| Dayton | 6 | 5,874 | 5,664 | 0.72% | 4,522 | 1.30 | City |
| Bellevue | 7 | 5,753 | 5,548 | 0.72% | 6,357 | 0.91 | City |
| Southgate | 8 | 3,818 | 3,652 | 0.87% | 2,619 | 1.46 | City |
| Claryville | 9 | 3,616 | 2,896 | 2.38% | 502 | 7.20 | CDP |
| Wilder | 10 | 3,050 | 3,174 | -0.81% | 845 | 3.61 | City |
| Silver Grove | 11 | 1,232 | 1,162 | 1.15% | 1,090 | 1.13 | City |
| Melbourne | 12 | 478 | 458 | 0.84% | 572 | 0.83 | City |
| Crestview | 13 | 469 | 449 | 0.86% | 2,968 | 0.16 | City |
| Mentor | 14 | 227 | 216 | 0.89% | 304 | 0.75 | City |
| Woodlawn | 15 | 220 | 214 | 0.46% | 3,729 | 0.06 | City |
| California | 16 | 82 | 79 | 1.23% | 373 | 0.22 | City |
Fort Thomas is the largest city in Campbell County, with a population of 16,673.
California is the smallest city in Campbell County.
There are 16 cities in Campbell County, Kentucky.