- Kammerer Family Business Collection, 1842/19145
- Kanawha County (W. Va.) Court Records and Miscellaneous Papers, 1773/193333
- Kanawha Salt Industry, Records, 1837/18971
- Katherine Courtenay Johnston Collection, 1829/19461
- Katherine G. Johnson, Mathematician, Papers, 1800/2024, bulk 2016/20214
- Katherine Williams, Collector, Williams Family Papers, 1840/20054
- Kendall Family of Marion County Papers, 1849/1959, bulk 1900/19451
- Kenneth Fones-Wolf, Historian, Research Papers Regarding Confederacy Supporters in Wheeling, 1819/2004, bulk 1850/18701
- Key Family Papers, 1812/19042
- Kincaid Family Papers, 1803/18802
- Kingwood Methodist Church History and Baptismal Record, 1816/18961
- Kitchen Equipment Collection, 1847/20032
- Kitty Kemper Memorandum Book, 1845/18972