| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lebanon | 1 | 56,325 | 38,908 | 5.45% | 1,385 | 41 | City |
| Mount Juliet | 2 | 46,389 | 39,682 | 2.69% | 1,726 | 27 | City |
| Watertown | 3 | 1,718 | 1,555 | 1.6% | 1,196 | 1 | City |
Lebanon is the largest city in Wilson County, with a population of 56,325.
Watertown is the smallest city in Wilson County, with a population of 1,718.
There are 3 cities in Wilson County, Tennessee.