2 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Johnson City | 1 | 74,892 | 71,121 | 0.85% | 1,710 | 44 | City |
| Jonesborough | 2 | 7,161 | 5,916 | 2.99% | 1,345 | 5 | Town |
Johnson City is the largest city in Washington County, with a population of 74,892.
Jonesborough is the smallest city in Washington County, with a population of 7,161.
There are 2 cities in Washington County, Tennessee.