Founded in 1837, Mercer County is one of 55 counties in the state of West Virginia. Historically, Mercer County was formed from Giles County (Virginia) and Tazewell County (Virginia). The city of Princeton is the county seat. With FIPS code of 55, Mercer County has a population of 59,097 and area of 420 square miles (1,088 km2).
List of all cities in Mercer County, WV alphabetically
| City/Town | Postal Code | Area Code |
| Ada, WV | 24701 | 304 |
| Athens, WV | 24712 | 304 |
| Beeson, WV | 24714 | 304 |
| Bluefield, WV | 24701 | 304 |
| Bluewell, WV | 24701 | 304 |
| Bramwell, WV | 24715 | 304 |
| Brush Fork, WV | 24701 | 304 |
| Camp Creek, WV | 25820 | 304 |
| Ceres, WV | 24701 | 304 |
| Coaldale, WV | 24724 | 304 |
| Dott, WV | 24736 | 304 |
| Duhring, WV | 24747 | 304 |
| Elgood, WV | 24740 | 304 |
| Flat Top, WV | 25841 | 304 |
| Freeman, WV | 24724 | 304 |
| Giatto, WV | 24736 | 304 |
| Green Valley, WV | 24701 | 304 |
| Hiawatha, WV | 24729 | 304 |
| Kegley, WV | 24731 | 304 |
| Kellysville, WV | 24732 | 304 |
| Lashmeet, WV | 24733 | 304 |
| Lerona, WV | 25971 | 304 |
| Littlesburg, WV | 24701 | 304 |
| Lorton Lick, WV | 24701 | 304 |
| Matoaka, WV | 24736 | 304 |
| Mc Comas, WV | 24747 | 304 |
| Montcalm, WV | 24737 | 304 |
| Nemours, WV | 24738 | 304 |
| Oakvale, WV | 24739 | 304 |
| Oakvale, WV | 24740 | 304 |
| Princeton, WV | 24740 | 304 |
| Rock, WV | 24747 | 304 |
| Sandlick, WV | 24701 | 304 |
| Spanishburg, WV | 25922 | 304 |
| Wolfe, WV | 24751 | 304 |