- Mill Creek Falls
- Money Island
- Monroe
- Moon Island
- Mount Pleasant
- Mozart
- Mumbauersville
- Marwood
- McBride
- McCalmont
- McFann
- Meharg
- Middle Lancaster
- Millerstown
- Mineral Spring
- Moniteau
- Moores Corners
- Mount Chestnut
- Mount Chestnut Springs
- Muddy Creek
- Murrinsville
- Martindale
- Miller Shaft
- Minersville
- Moshannon
- Moudy Hill
- Mountaindale
- Moxham
- Mundys Corner
- Munster