4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Petersburg | 1 | 2,271 | 2,284 | -0.26% | 1,405 | 2 | City |
| Petersburg | 2 | 2,271 | 2,300 | -0.26% | 1,405 | 2 | City |
| Bayard | 3 | 208 | 217 | -0.95% | 669 | 0 | Town |
| Bayard | 4 | 208 | 217 | -0.95% | 669 | 0 | Town |
Petersburg is the largest city in Grant County, with a population of 2,271.
Bayard is the smallest city in Grant County, with a population of 208.
There are 4 cities in Grant County, West Virginia.