Location Represented
- McDowell (county)51
- McPherson (county)2
- Mercer (county)60
- Mexico (nation)1
- Miami Beach (inhabited place)6
- Michigan (state)75
- Middle East (general region)5
- Milton (inhabited place)4
- Mingo (county)59
- Minnesota (state)23
- Mississippi (state)40
- Missouri (state)77
- Moline (inhabited place)1
- Monongalia (county)1
- Monroe (county)1
- Montana (state)47
- Morgantown (inhabited place)2
- Morganville (inhabited place)1
- Mullens (inhabited place)5
- Myanmar (nation)10
