- Kamawa-sa manuscript, 1920/19501
- Kanawha County (W. Va.) Court Records and Miscellaneous Papers, 1773/19337
- Kappa Alpha Theta, Beta Lambda Chapter Records, 1921/2005, bulk 1930/19902
- Kappa Alpha, Alpha Zeta Chapter Records, 1915/1966, bulk 1948/20085
- Kappa Delta Pi. Alpha Chi Chapter Records, 1923/19864
- Kappa Kappa Gamma (Gamma Kappa Chapter) Records, 1923/20147
- Karen Haught, Compiler, Newspaper Clipping Notebooks Regarding Monongalia County, and Greene County, Pennsylvania, 1930/19831
- Karl D. Myers, Poet Laureate of West Virginia, Papers, 1926/19511
- Katherine Anne Porter collection, 1921/19651
- Katherine Courtenay Johnston Collection, 1829/19461
- Katherine Dunn Thompson School Records & Memorabilia, 1926/19492
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/202110
- Katherine Preston Everhart Papers, 1930/19331
- Katherine Williams, Collector, Williams Family Papers, 1840/20059
- Kathleen Bonnie Crispin Worsham papers, 1860/20188