Founded in 1772, Berkeley County is one of 55 counties in the state of West Virginia. Historically, Berkeley County was formed from Frederick County (Virginia). The city of Martinsburg is the county seat. With FIPS code of 3, Berkeley County has a population of 126,069 and area of 321 square miles (831 km2).
List of all cities in Berkeley County, WV alphabetically
| City/Town | Postal Code | Area Code |
| Bunker Hill, WV | 25413 | 304 |
| Cherry Run, WV | 25427 | 304 |
| Falling Waters, WV | 25419 | 304 |
| Falling Wtrs, WV | 25419 | 304 |
| Gerrardstown, WV | 25420 | 304 |
| Glengary, WV | 25421 | 304 |
| Hedgesville, WV | 25427 | 304 |
| Inwood, WV | 25428 | 304 |
| Jones Springs, WV | 25427 | 304 |
| Martinsburg, WV | 25401 | 304 |
| 25402 | 304 | |
| 25403 | 304 | |
| 25404 | 304 | |
| 25405 | 304 | |
| 25429 | 304 | |
| North Thompson Outfitters, WV | 25429 | 304 |
| Ridgeway, WV | 25440 | 304 |