- Pike Township
- Prairie
- Preston
- Passport
- Pureton
- Pettifer Island
- Poplar Grove
- Paderborn
- Petersburg
- Peterson Island
- Phelps
- Pontiac
- Pankeyville
- Pasfield
- Pawnee Junction
- Peabody
- Prouty
- Pleasant View
- Pitchin
- Pleak
- Poplar Ridge
- Plainfield
- Point Pleasant
- Parkland
- Pekin Heights
- Powerton
- Piasa Island
- Pottsville
- Pellville
- Pleasant Valley