- Kappa Delta Composites, 1982/20173
- Kappa Kappa Gamma (Gamma Kappa Chapter) Records, 1923/20145
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/202123
- Kathleen Bonnie Crispin Worsham papers, 1860/20183
- Kenneth Crispell papers, 1904/20211
- Kenneth Kreider, Artist, Illustrations and Prints, 1981/20121
- Kenneth R. White Papers, 1973/20201
- Kimiko Suzuki Architectural Collection, 1963/20131
- Kluge Children's Rehabilitation Center records, 1952/20124
- Krasnow Institute for Advanced Study records, 1985/20156
- Kristine K. Fallon Papers, 1966/20183
- Kurt Richard Weimer letters, 1965/20171