| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Johnson City | 1 | 75,575 | 71,072 | 0.84% | 1,726 | 44 | City |
| Jonesborough | 2 | 7,193 | 5,911 | 2.9% | 1,351 | 5 | Town |
Johnson City is the largest city in Washington County, with a population of 75,575.
Jonesborough is the smallest city in Washington County, with a population of 7,193.
There are 2 cities in Washington County, Tennessee.