| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Leonardtown | 1 | 5,153 | 4,542 | 2.38% | 1,338 | 4 | Town |
Leonardtown is the largest city in St. Mary's County, with a population of 5,153.
Leonardtown is the smallest city in St. Mary's County, with a population of 5,153.
There is 1 city in St. Mary's County, Maryland.