11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bardstown | 1 | 14,234 | 13,567 | 0.92% | 1,176 | 12 | City |
| Bardstown | 2 | 14,234 | 13,582 | 0.92% | 1,176 | 12 | City |
| Bloomfield | 3 | 1,002 | 959 | 0.8% | 695 | 1 | City |
| Bloomfield | 4 | 1,002 | 959 | 0.8% | 695 | 1 | City |
| New Haven | 5 | 836 | 799 | 0.84% | 1,441 | 1 | City |
| New Haven | 6 | 836 | 799 | 0.84% | 1,441 | 1 | City |
| Chaplin | 7 | 649 | 577 | 2.37% | 469 | 1 | CDP |
| Boston | 8 | 202 | 138 | -1.94% | 103 | 2 | CDP |
| Fairfield | 9 | 138 | 120 | 2.22% | 483 | 0 | City |
| Fairfield | 10 | 138 | 120 | 2.22% | 483 | 0 | City |
| New Hope | 11 | 12 | 63 | -36.84% | 19 | 1 | CDP |
Bardstown is the largest city in Nelson County, with a population of 14,234.
New Hope is the smallest city in Nelson County, with a population of 12.
There are 11 cities in Nelson County, Kentucky.