- Perrysburg
- Perrysville
- Perryville
- Pershing
- Perth
- Peru
- Peters Switch
- Petersburg
- Peterson
- Petersville
- Petroleum
- Pettit
- Pettysville
- Phenix
- Philadelphia
- Philip Station
- Philomath
- Phlox
- Piattsville
- Pickard
- Pickwick Park
- Pierceton
- Pierceville
- Pierson Station
- Pigeon
- Pigeon Roost Station
- Pike
- Pikes Peak
- Pikeville
- Pilot Knob