- Jiménez Núñez, Ricardo, 1879-1946, author1
- Johnson, C. Lawson (Charles Lawson), 1886- author1
- Johnson, O. A. (Ora Alexander), 1872- author1
- Joint Committee on Methods of Preventing Delinquency, author.1
- Joseph Leidy Commemorative Meeting (1923 : Philadelphia, Pa.), author.1
- Joslin, Elliott P., 1869-1962, author1
- Kammerer, Paul, 1880-1926, author1
- Katsainos, George M., author1
- Keen, William W. (William Williams), 1837-1932, author1
- Kellogg, John Harvey, 1852-1943, author4
- Kellogg, Vernon L. (Vernon Lyman), 1867-1937, author1
- Kelly, Howard A. (Howard Atwood), 1858-1943, author1
- Kendall, Arthur Isaac, 1877- author1
- Kenwood, Henry R. (Henry Richard), 1862-1945, author1
- Kerrison, Philip D., 1861-1944, author1
- Keyes, Edward L. (Edward Loughborough), 1873-1949, author1
- King, Basil, 1859-1928 author1
- Klimmer, Martin, 1873-1942, author1
- Knowles, Frank Crozer, 1881-1957, author1
- Kobacker, J. Lester, 1900-1982, author1