M
- Mabel
- Macbeth
- Macdale
- Macdonaldton
- Macedonia
- Macedonia
- Mackey Ford
- Mackeyville
- Macungie
- Maddensville
- Madera
- Madison
- Madisonburg
- Madisonville
- Madley
- Magee
- Mahaffey
- Mahanoy City
- Mahanoy Plane
- Mahantango
- Mahoning
- Mahoningtown
- Maiden Creek
- Mainesburg
- Mainland
- Mainsville
- Mainville
- Maitland
- Majorsville
- Malta
- Malvern
- Mammoth
- Mamont
- Manada Gap
- Manatawny
- Mance
- Manchester
- Manchester Beach
- Mandata
- Manheim
- Manifold
- Manifold Manor
- Man Meter
- Mann
- Mannitto Haven
- Manns Choice
- Mannsville
- Manor
- Manor Hill
- Manorville
- Mansdale
- Mansfield
- Mansville
- Mantz
- Mantzville
- Mapledale
- Maple Glen
- Maple Glen
- Maple Grove
- Maple Grove
- Maple Grove
- Maple Grove
- Maple Grove
- Maple Grove
- Maple Grove
- Maple Grove Park
- Maple Hill
- Maple Hill
- Maplelake
- Mapleton
- Mapletown
- Maplewood
- Maplewood Heights
- Marble
- Marble Hill
- Marburg
- Marchand
- Mardin
- Marengo
- Marguerite
- Maria
- Marianna
- Marianne
- Mariasville
- Marienville
- Marietta
- Marion
- Marion Center
- Marion Heights
- Marion Hill
- Markes
- Marketsville
- Markham
- Markle
- Marklesburg
- Markleton
- Markleysburg
- Markton
- Marlboro
- Marlboroville
- Mar Lin
- Marple
- Marron
- Mars
- Marshall
- Marshall Hollow
- Marshalls Creek
- Marshallton
- Marshbrook
- Marshburg
- Marshfield Station
- Marsh Hill
- Marshlands
- Marsh Run
- Marshview
- Marshwood
- Marsteller
- Marstown
- Martha Furnace
- Martic Forge
- Marticville
- Martin
- Martindale
- Martindale
- Martinsburg
- Martins Corner
- Martins Creek
- Martins Crossroads
- Martinsville
- Martzville
- Marvania Heights
- Marvindale
- Marwood
- Maryd
- Maryland Line
- Marysville
- Mason
- Mason and Dixon
- Mason Dixon Village
- Masontown
- Masseyburg
- Masten
- Mastersonville
- Mast Hope
- Matamoras
- Matamoras
- Mateer
- Mather
- Mattawana
- Matthews
- Matthews Run
- Mattie
- Mausdale
- Maxatawny
- Mayburg
- Mayfair
- Mayfield
- Mayfield
- Mayport
- Maysville
- Maytown
- Maze
- Mazeppa
- McAdams
- McAdoo
- McAlisterville
- McAlveys Fort
- McCalmont
- McCandless Township
- McCarroll Corner
- McCartney
- McCartys Corner
- McCauley
- McClasin
- McCleary
- McClellandtown
- McClure
- McConnelis Mill
- McConnellsburg
- McConnellstown
- McCoysville
- McCoytown
- McCracken
- McCrays
- McCrea
- McCrea Furnace
- McCullochs Mills
- McCullough
- McDermott
- McDonald
- McElhattan
- McEwensville
- McGarey
- McGees Mills
- McGillstown
- McGovern
- Mc Gregor
- McHaddon
- Mc Ilhaney
- McIntyre
- McKean
- McKeansburg
- McKee
- McKee
- McKees Half Falls
- McKeesport
- McKees Rocks
- McKenzie Corners
- McKinney
- McKnight
- McKnightstown
- McLallen Corners
- McLane
- McLaughlin Corners
- McMichael
- McMillan
- McMurray
- McNees
- McPherron
- McSherrystown
- McSparran
- McVeytown
- McVille
- Meadowbrook
- Meadow Gap
- Meadow Lands
- Meadowood
- Meadowville
- Meadville
- Mechanicsburg
- Mechanicsville
- Mechanicsville
- Mechnical Grove
- Meckesville
- Mecks Corner
- Meckville
- Media
- Medix Run
- Meeker
- Mehoopany
- Mehoopany Sta
- Melcroft
- Mellots Mill
- Melrose
- Melrose
- Melrose Park
- Mench
- Mendenhall
- Mendon
- Menges Mill
- Mentcle
- Mentzer
- Mercer
- Mercersburg
- Mercersburg Junction
- Mercur
- Meredith
- Meridian
- Merrill
- Merrittstown
- Merryall
- Mertztown
- Mertz Town
- Merwinsburg
- Meshoppen
- Messmore
- Metal
- Metcalf
- Metzler
- Mexico
- Meyersdale
- Middleboro
- Middleburg
- Middlebury Center
- Middle Creek
- Middle Lancaster
- Middleport
- Middle Run
- Middlesex
- Middle Spring
- Middletown
- Middletown
- Middletown
- Midland
- Midland
- Midvale
- Midway
- Midway
- Miffin Cross Roads
- Mifflin
- Mifflinburg
- Mifflintown
- Mifflinville
- Milan
- Milanville
- Milbell
- Milburn
- Mildred
- Mile Run
- Milesburg
- Milesville
- Milford
- Milford
- Milford Square
- Millardsville
- Millback
- Millbourne
- Millbrook
- Mill City
- Mill Creek
- Milledgeville
- Millersburg
- Millers Corner
- Millers Corners
- Millers Station
- Millerstown
- Millerstown
- Millersville
- Millerton
- Millertown
- Mill Grove
- Mill Hall
- Millheim
- Milligantown
- Millport
- Millritt
- Mill Run
- Mill Run
- Mill Run
- Mills
- Millstone
- Milltown
- Millvale
- Millview
- Mill Village
- Millville
- Millville
- Milnor
- Milroy
- Milton
- Milton Grove
- Milwaukee
- Mina
- Mineral Point
- Mineral Springs
- Mineral Springs
- Minersville
- Minerville
- Minesite
- Mingo
- Mingoville
- Minisnk Hills
- Minister
- Minnequa
- Minnis Corner
- Minooka
- Miola
- Miquon
- Misertown
- Mitchell Creek
- Mix Run
- Mixtown
- Mocanaqua
- Modena
- Moffitt Sterling
- Mohns Hill
- Mohnton
- Mohrsville
- Molino
- Monaca
- Monarch
- Monessen
- Mongu
- Moninger
- Monocacy
- Monongahela
- Monroe
- Monroe Furnace
- Monroe Lake
- Monroeton
- Monroeville
- Mont Alto
- Montandon
- Mont Clare
- Montdale
- Montebello
- Montello
- Monterey
- Monterey
- Montgomery
- Montgomery Ferry
- Montgomeryville
- Monticello
- Montmorenci
- Montoursville
- Montrose
- Montrose
- Montrose Hill
- Montsera
- Monument
- Moon
- Moon Run
- Mooresburg
- Moores Corners
- Moorestown
- Moorhead
- Moosic
- Morann
- Moravia
- Mordansville
- Moreland
- Morford
- Morgan
- Morgans Land
- Morgantown
- Morris
- Morris Crossroads
- Morrisdale
- Morris Run
- Morrisville
- Morrisville
- Morstein
- Morton
- Mortonville
- Morwood
- Moscow
- Moselem Springs
- Moshannon
- Mosherville
- Mosiertown
- Mossville
- Mostoller
- Mottarns Mill
- Mount Aetna
- Mountaindale
- Mountain Green
- Mountain Grove
- Mountainhome
- Mountain Lake
- Mountain Springs
- Mountain Top
- Mountain Top
- Mountain Top Estates
- Mountain View Acres
- Mount Air
- Mount Airy
- Mount Alton
- Mount Bethel
- Mount Braddock
- Mount Carbon
- Mount Carmel
- Mount Chestnut
- Mount Cobb
- Mount Eagle
- Mount Etna
- Mount Gretna
- Mount Gretna Heights
- Mount Herman
- Mount Holly Springs
- Mount Hope
- Mount Hope
- Mount Hope
- Mount Hope
- Mount Jackson
- Mount Jewett
- Mount Joy
- Mount Lebanon
- Mount Morris
- Mount Nebo
- Mount Oliver
- Mount Patrick
- Mount Penn
- Mount Pleasant
- Mount Pleasant
- Mount Pleasant Mills
- Mount Pocono
- Mount Rock
- Mount Rock
- Mount Royal
- Mount Sterling
- Mount Tabor
- Mount Tabor
- Mount Top
- Mount Union
- Mount Vernon
- Mountville
- Mount Washington
- Mount Washington
- Mount Wolf
- Mount Zion
- Mount Zion
- Mount Zion
- Mount Zion
- Mount Zion
- Moween
- Mowersville
- Mowry
- Mowry
- Moyer
- Moyers Grove
- Moylan
- Mt Laffee
- Muddy Creek
- Muddy Creek Forks
- Muff
- Muhlenburg
- Mummasburg
- Muncy
- Muncy Station
- Muncy Valley
- Munderf
- Mundys Corner
- Munhall
- Munson
- Murdock
- Murdocksville
- Murray
- Murray
- Murrinsville
- Murry Hill
- Murrysville
- Muse
- Musellmans Crossing
- Musser
- Mutual
- Muzette
- Myersbrook
- Myersburg
- Myerstown
- Myersville
- Myobeach
- Myoma
- Myrtle
- Mystic Park