Cities
United States
- Lock Haven
- Long Pond
- Lower Merion Township
- Malvern
- Manheim
- Mars
- Marshalls Creek
- McCandless
- McDonald
- McKees Rocks
- McKeesport
- Meadowbrook
- Meadville
- Mechanicsburg
- Media
- Mehoopany
- Melrose Park
- Mercersburg
- Merion Station
- Meyersdale
- Milanville
- Milford
- Mill Run
- Millersburg
- Millersville
- Millvale
- Mohnton
- Monaca
- Monessen
- Monongahela
- Monroe County
- Monroeville
- Montgomery County
- Montrose
- Moon
- Morrisville
- Morton
- Morton
- Mount Bethel
- Mount Gretna
- Mount Joy
- Mount Lebanon
- Mount Pocono
- Mountain Top
- Mountainhome
- Muncy
- Munhall
- Murrysville
- Narberth
- Natrona Heights
- Nazareth
- Nether Providence Township
- New Alexandria
- New Castle
- New Cumberland
- New Freedom
- New Hope
- New Kensington
- New Milford
- New Salem Borough