- 2 Port Royal, South Carolina
- 6 Port Sunlight, England
- 1 Port Townsend, Washington
- 13 Portable buildings
- 1 Porter & Coates
- 1 Porter & Dickey Park Mills
- 13 Porter Street
- 6 Porticoes (Porches)
- 5 Portland, Maine
- 1 Portland, Oregon
- 4 Portrait drawings
- 6 Portrait paintings
- 822 Portrait photographs
- 46 Portrait prints
- 1318 Portraits
- 31 Ports
- 3 Portsmouth, England
- 6 Portugal
- 1 Portugese Government Building
- 1 Portuondo, V. Cigar Factory
- 1 Possibilities
- 1 Post Hotel
- 28 Post offices
- 2 Postage stamps
- 6 Postal cards
- 8 Postal service
- 1 Postal Telegraph Co.
- 275 Postcards
- 76 Posters
- 1 Posting signs & notices
- 2 Postmasters
- 10 Post-office boxes
- 1 Postponed action
- 1 Potash
- 4 Potatoes
- 2 Pots (containers)
- 2 Potter & Hoffman
- 52 Potter, Beatrix, 1866-1943
- 1 Potter, C.W. Tinware Factory
- 2 Potter, Paul M. (Paul Meredith), 1853-1921. Conquerors - Posters
