Places
- Mahoning County (Ohio)1
- Marion County (W. Va.)3
- Mason County (W. Va.)1
- Mexico1
- Mineral County (W. Va.)1
- Mississippi River1
- Monongahela River (W. Va. and Pa.)1
- Monongalia County (W. Va.)4
- Monroe County (W. Va.)1
- Montana1
- Morgantown (W. Va.)4
- Morgantown (W. Va.) -- History1
- Mountain Lake Park (Md.)2
- New Orleans (La.)1
- Nicholas County (W. Va.)1