- McElhaneys Island
- McElhattan
- McEwensville
- McFann
- McGarey
- McGees Mills
- McGillstown
- McGovern
- McGovernsville
- McGrann
- McGuire Island
- McHaddon
- McIlhaney
- McIntyre
- McKeages Crossing
- McKean
- McKean
- McKeansburg
- McKee
- McKee
- McKees Half Falls
- McKees Rocks
- McKeesport
- McKimm
- McKinley
- McKinley
- McKinley Hill
- McKinney
- McKnight
- McKnightstown