| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Grundy | 1 | 799 | 886 | -1.96% | 160 | 5 | Town |
Grundy is the largest city in Buchanan County, with a population of 799.
Grundy is the smallest city in Buchanan County, with a population of 799.
There is 1 city in Buchanan County, Virginia.