9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marion | 1 | 5,534 | 5,741 | -0.74% | 1,154 | 4.79 | Town |
| Saltville | 2 | 1,753 | 1,818 | -0.74% | 219 | 8.02 | Town |
| Chilhowie | 3 | 1,595 | 1,657 | -0.75% | 629 | 2.53 | Town |
| Adwolf | 4 | 1,410 | 1,771 | -0.56% | 153 | 9.22 | CDP |
| Atkins | 5 | 999 | 1,049 | -0.99% | 161 | 6.20 | CDP |
| Allison Gap | 6 | 809 | 760 | 7.15% | 308 | 2.63 | CDP |
| Sugar Grove | 7 | 714 | 827 | -0.42% | 245 | 2.92 | CDP |
| Seven Mile Ford | 8 | 676 | 713 | -1.02% | 529 | 1.28 | CDP |
| McMullin | 9 | 184 | 442 | -9.36% | 188 | 0.98 | CDP |
Marion is the largest city in Smyth County, with a population of 5,534.
McMullin is the smallest city in Smyth County.
There are 9 cities in Smyth County, Virginia.