- Petty, Orlando H. (Orlando Henderson), 1874-1932 author1
- Pfister, Oskar, 1873-1956 author1
- Philbrick, Maurice Swain, 1896-1984, author1
- Phillips, Anna C. (Anna Crawford), 1889- author1
- Phillips, Thomas Guthrie, 1887-1
- Pillsbury, Stirling G. (Stirling Gainer), 1898- author1
- Plass, Everett Dudley, 1886-, author1
- Platt, Philip S. (Philip Skinner), 1889- author1
- Poffenberger, Albert T. (Albert Theodore), 1885-1977, author1
- Pool, Eugene H. (Eugene Hillhouse), 1874-1949, author1
- Pope, Amy Elizabeth, 1869- author2
- Pope, Amy Elizabeth, 1869-, author1
- Porter, Charles Sanford, 1862- author1
- Porteus, S. D. (Stanley David), 1883-1972, author1
- Posner, John Jacob, 1888-1965, author1
- Pratt, Fred J. (Fred John), 1876- author1
- Pratt, George K. (George Kenneth), 1891-1957 author1
- Pratt, John A. (John Abraham), 1868- author1
- Prescott, Samuel Cate, 1872-19621
- Pressler, Gene, artist2