| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bardstown | 1 | 14,280 | 13,575 | 0.84% | 1,179 | 12 | City |
| Bloomfield | 2 | 1,020 | 964 | 0.89% | 708 | 1 | City |
| New Haven | 3 | 844 | 803 | 0.84% | 1,455 | 1 | City |
| Fairfield | 4 | 141 | 119 | 2.17% | 493 | 0 | City |
Bardstown is the largest city in Nelson County, with a population of 14,280.
Fairfield is the smallest city in Nelson County, with a population of 141.
There are 4 cities in Nelson County, Kentucky.