Founded in 1842, Marion County is one of 55 counties in the state of West Virginia. Historically, Marion County was formed from Harrison and Monongalia counties. The city of Fairmont is the county seat. With FIPS code of 49, Marion County has a population of 56,001 and area of 310 square miles (803 km2).
List of all cities in Marion County, WV alphabetically
| City/Town | Postal Code | Area Code |
| Barrackville, WV | 26559 | 304 |
| Baxter, WV | 26560 | 304 |
| Bellview, WV | 26554 | 304 |
| Carolina, WV | 26563 | 304 |
| Colfax, WV | 26566 | 304 |
| Fairmont, WV | 26554 | 304 |
| Fairmont, WV | 26555 | 304 |
| Fairview, WV | 26570 | 304 |
| Farmington, WV | 26571 | 304 |
| Four States, WV | 26572 | 304 |
| Grant Town, WV | 26574 | 304 |
| Idamay, WV | 26576 | 304 |
| Jordan, WV | 26554 | 304 |
| Kingmont, WV | 26578 | 304 |
| Mannington, WV | 26582 | 304 |
| Metz, WV | 26585 | 304 |
| Monongah, WV | 26554 | 304 |
| Monongah, WV | 26555 | 304 |
| Montana Mines, WV | 26586 | 304 |
| Pleasant Valley, WV | 26554 | 304 |
| Pleasant Valley, WV | 26555 | 304 |
| Rachel, WV | 26587 | 304 |
| Rivesville, WV | 26588 | 304 |
| White Hall, WV | 26554 | 304 |
| Whitehall, WV | 26555 | 304 |
| Worthington, WV | 26591 | 304 |