P
- Paderborn
- Padua
- Painville
- Paisley Corners
- Palatine
- Palermo
- Palestine
- Palisades
- Palmer
- Palmerton
- Palm Garden Mobile Home Park
- Palmyra
- Palmyra
- Paloma
- Palos Heights
- Palos Hills
- Palos Park
- Palzo
- Pana
- Panama
- Pankeyville
- Panola
- Papineau
- Paradise
- Paris
- Park City
- Parker
- Parkersburg
- Park Forest
- Parkland
- Park Ridge
- Parkville
- Parnell
- Parrish
- Pasfield
- Passport
- Patoka
- Patterson
- Patterson Springs
- Patton
- Pattonsburg
- Paulton
- Pavilion
- Pawnee
- Paw Paw
- Paxton
- Paynes Point
- Payson
- Paytonville
- Peabody
- Pearl
- Pearl City
- Pecatonica
- Pegram
- Pekin
- Pellville
- Penfield
- Pennington Point
- Penrose
- Peoria
- Peoria Heights
- Peotone
- Percy
- Perdueville
- Perks
- Perry
- Perryville
- Peru
- Peshing
- Pesotum
- Peters
- Petersburg
- Peters Creek
- Peterstown
- Petersville
- Peterville
- Petrolia
- Phelps
- Phelps
- Philadelphia
- Phillipstown
- Philo
- Phoenix
- Piasa
- Piasa Hills
- Piatt
- Pierceburg
- Pierron
- Pierron
- Pierson
- Pike
- Pikeville
- Pinckneyville
- Pingree Grove
- Pinkstaff
- Pioneer
- Piopolis
- Piper City
- Pisgah
- Pistakee
- Pistakee Highlands
- Pitchin
- Pittsburg
- Pittsfield
- Pittwood
- Plainfield
- Plainview
- Plainville
- Plano
- Plato Center
- Plato Corners
- Plattville
- Pleak
- Pleasant Grove
- Pleasant Hill
- Pleasant Hill
- Pleasant Mound
- Pleasant Plains
- Pleasant Valley
- Pleasant View
- Plumfield
- Plum Hill
- Plymouth
- Poag
- Pocahontas
- Point Pleasant
- Polk
- Polo
- Polsgrove
- Pomona
- Pond
- Ponemah
- Pontiac
- Pontoon Beach
- Pontoosuc
- Poplar City
- Poplar Grove
- Port Barrington
- Port Byron
- Porterfield
- Port Jackson
- Portland Corners
- Portuguese Hill
- Posen
- Posey
- Post Oak
- Potomac
- Pottstown
- Pottsville
- Poverty Ridge
- Powellton
- Powley Corners
- Prairie
- Prairie Center
- Prairie City
- Prairie du Rocher
- Prairie Grove
- Prairie Hall
- Prairie Home
- Prairietown
- Prairie View
- Prairieville
- Preemption
- Preston
- Preston Heights
- Preston Heights
- Princeton
- Princeville
- Priscilla
- Proctor
- Progess
- Prophetstown
- Prospect
- Prospect Heights
- Prouty
- Providence
- Pruett
- Puder
- Pujol
- Pulaski
- Pulleys Mill
- Pureton
- Putnam
- Pyatts
- Pyramid