Pero - Plat
- Perot, (Henry) Ross
- Perry Drug Stores, Inc.
- Perry Mason
- Perry Mission
- Perry's Victory and International Peace Memorial
- Perry, Matthew Calbraith
- Perry, Oliver Hazard
- Pershing
- Pershing Expedition
- Pershing Park
- Pershing Rifles
- Pershing, John Joseph
- Persian Gulf War
- person-to-person call
- personal communicator
- personal finance company
- personal identification number
- Personal Products Corp.
- personal property
- Personal Staff, Army Chief of Staff
- Personal Touch
- Personna
- Personnel Administrator of Massachusetts v. Feeney
- Perth Amboy
- pet bank
- Pet Banks
- Petaluma
- Peter Britt Festivals
- Peter Cottontail
- Peter Pan
- Peter, Paul, and Mary
- Peterbilt
- Peterborough
- Petersburg National Battlefield
- Petersen House
- Peterson Air Force Base
- Peterson, Roger Tory
- petit jury
- petit larceny
- petite size
