- Kappa Alpha, Alpha Zeta Chapter Records, 1915/1966, bulk 1948/20082
- Kappa Delta Composites, 1982/20173
- Kappa Kappa Gamma (Gamma Kappa Chapter) Records, 1923/20145
- Kappa Kappa Psi Records, 1958/2009, bulk 1979/200920
- Karla K. Bruno Papers, 2007-2010, 2007/20101
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/202118
- Kathleen Bonnie Crispin Worsham papers, 1860/20184
- Kenneth Crispell papers, 1904/20211
- Kenneth E. Sensabaugh Papers, 1944/2009, bulk 1944/19542
- Kenneth Kreider, Artist, Illustrations and Prints, 1981/20121
- Kenneth R. White Papers, 1973/20201
- Kenneth W. Newman Records, 1971/20041
- Kimiko Suzuki Architectural Collection, 1963/20131
- Kjell Sandved nature photograph collection, 1960/20081
- Kluge Children's Rehabilitation Center records, 1952/201210