- 2 Potter, Paul M. (Paul Meredith), 1853-1921. Conquerors - Posters
- 2 Potter, Thomas, Son & Co. Oil Cloth Works
- 1 Potteries (factories)
- 48 Pottery
- 13 Pottery industry
- 1 Pottier (Firm)
- 12 Pottstown, Pennsylvania
- 2 Poultry
- 1 Pounds (coins)
- 10 Poverty
- 1 Powder
- 1 Powder flasks
- 3 Powder mills
- 1 Powel House
- 2 Powell & Bishop
- 6 Powell House
- 2 Powell, Nathaniel (1813-1873)
- 2 Powell, Thomas, 1809-1887
- 2 Powell, W. Bleddyn, Architect
- 1 Powell's Saw Mill
- 1 Powelton Avenue
- 3 Powelton Avenue
- 1 Powelton Avenue
- 1 Powelton Hotel
- 9 Powelton, Pennsylvania
- 2 Power
- 3 Power lines
- 5 Power, Marguerite A., 1815?-1867
- 1 Power, Tyrone, 1797-1841
- 3 Powerhouses
- 13 Powers & Weightman
- 1 Power's Philadelphia Cider & Vinegar Works
- 1 Practical Technological Institute
- 1 Prague, Czech Republic
- 1 Pratt see Robinson & Pratt
- 7 Pratt Street
- 1 Pratt trusses
- 1 Pratt, Henry, 1761-1838
- 1 Pratt, Jas. D. Coal & Lumber Yard
- 2 Pratt's Food Co.
