Name
- Kellerman, William Ashbrook, American botanist1
- Kergorlay, Jean Florian Hervé, Comte, agriculturist1
- Key, Charles Aston, surgeon1
- Kinahan, George Henry, geologist1
- King, George, Knight, botanist, 1840-19091
- King, Richard, arctic traveller and ethnologist1
- King, William, geologist; of Add MS 425801
- Kitton, Frederic, naturalist1
- Kiænskou, Hjalmar Frederik Christian, Danish botanist1
- Koninck, Laurent Guillaume, Belgian palaeontologist1
- Kraus, Gregor Conrad Michael, German botanist1
- Kuckuck, Paul, German botanist1
- Kükenthal, Willy, German zoologist1
- La Touche, James Digues, Vicar of Stokesay; geologist1
- Lankester, Edwin Ray, KCB, FRS1
- Lapworth, Charles, FRS, geologist1
- Lartet, Louis, geologist1
- Lartet, Édouard Armand Isidore Hippolyte, French geologist1
- Laurillard, Charles Léopold, assistant to Baron Cuvier1
- Lavis, Henry James Johnston, geologist1