- Maria Furnace
- Marshall
- McKnightstown Station
- McSherry
- Menges Mill
- Mount Hope
- Mount Misery
- Mount Pleasant
- Mount Tabor
- Mummasburg
- Magill Heights
- Manchester
- Manown
- Marshall Island
- McAlisters Crossroads
- Mendelssohn
- Mifflin Junction
- Millerstown
- Milltown
- Mollenauer
- Monroe Heights
- Montour Junction
- Municipio de Moon
- Moon Crest
- Morgan Hill
- Morningside
- Mount Washington
- Murdocksville
- Mustard
- Mahoning