Cities in State of Illinois, United States ( 474 )
- Palos Park
- Pana
- Paris, Illinois
- Park City, Illinois
- Park Forest, Illinois
- Park Ridge, Illinois
- Pawnee, Illinois
- Paxton, Illinois
- Pekin, Illinois
- Peoria Heights
- Peoria, Illinois
- Peotone
- Peru, Illinois
- Pinckneyville
- Pingree Grove
- Pistakee Highlands
- Pittsfield
- Plainfield, Illinois
- Plano, Illinois
- Pontiac, Illinois
- Pontoon Beach
- Poplar Grove, Illinois
- Posen, Illinois
- Preston Heights
- Princeton, Illinois
- Prospect Heights, Illinois
- Quincy, Illinois
- Rantoul, Illinois
- Red Bud, Illinois
- Richton Park
- River Forest, Illinois
- River Grove
- Riverdale, Illinois
- Riverside, Illinois
- Riverton, Illinois
- Riverwoods