- Kammerer Family Business Collection, 1842/19149
- Kanawha County (W. Va.) Court Records and Miscellaneous Papers, 1773/193311
- Kanawha Salt Industry, Records, 1837/18971
- Kanawha and Ohio Railroad Company Ledger Book, 1890/19001
- Katherine Courtenay Johnston Collection, 1829/19461
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/20216
- Katherine Hamilton Diary, 1890/18972
- Katherine Williams, Collector, Williams Family Papers, 1840/20059
- Kathleen Bonnie Crispin Worsham papers, 1860/20183
- Kathryn Cramer Morgan, Charles William Cramer Family Papers, 1876/19701
- Katie L. Hopkins Collection of Sheet Music and Songbooks, 1890/19101
- Keller Hotel of Romney, West Virginia, Hotel Register, 1854/1909, bulk 1855/19071
- Kelley Family Photographs, 1890/19151
- Kemble White (1873-1965) Papers, 1898/19652
- Kendall Family of Marion County Papers, 1849/1959, bulk 1900/19451