- Kabler House Histories Collection (MS082), 1951/19651
- Kappa Alpha Theta, Beta Lambda Chapter Records, 1921/2005, bulk 1930/19903
- Kappa Alpha, Alpha Zeta Chapter Records, 1915/1966, bulk 1948/20083
- Kappa Delta Pi. Alpha Chi Chapter Records, 1923/19861
- Kappa Kappa Gamma (Gamma Kappa Chapter) Records, 1923/201411
- Karen Haught, Compiler, Newspaper Clipping Notebooks Regarding Monongalia County, and Greene County, Pennsylvania, 1930/19831
- Katherine Anne Porter collection, 1921/19652
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/202113
- Katherine M. Hunter, Compiler, Local Histories and Genealogies, 1948/19749
- Katherine Williams, Collector, Williams Family Papers, 1840/20054
- Kathleen Bonnie Crispin Worsham papers, 1860/201810
- Kathleen Neal Jones scrapbook, 1953/19552
- Kathryn Belle McGee Records regarding Rhododendron Girls State School at Jackson's Mill, 1941/2003, bulk 1941/19877
- Kathryn Cramer Morgan, Charles William Cramer Family Papers, 1876/19701
- Kathryn Eye Papers, 1920/199113