4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bardstown | 1 | 14,234 | 13,582 | 0.92% | 1,176 | 12 | City |
| Bloomfield | 2 | 1,002 | 959 | 0.8% | 695 | 1 | City |
| New Haven | 3 | 836 | 799 | 0.84% | 1,441 | 1 | City |
| Fairfield | 4 | 138 | 120 | 2.22% | 483 | 0 | City |
Bardstown is the largest city in Nelson County, with a population of 14,234.
Fairfield is the smallest city in Nelson County, with a population of 138.
There are 4 cities in Nelson County, Kentucky.