- Homann, Johann Baptist, 1663-17242
- Houghton, Douglass, 1809-18452
- Hubbard, Bela, 1814-18962
- Humphreys, A. A. (Andrew Atkinson), 1810-1883, director2
- I.T. Hinton & Simpkin & Marshall.2
- Ikeda, Tōri2
- Ives, J. C., explorer2
- Japan. Rikugun. Sanbō Honbu2
- Johnson & Browning2
- Judd, Philu E.2
- Kanamaru, Hikogorō2
- Kane, Elisha Kent, 1820-18572
- Kashihara, Yoshinaga2
- Keere, Pieter van den, 1571-approximately 16462
- Kentucky Geological Survey2
- Keulen, Gerard van2
- Kitchin, Thomas, 1718-17842
- Krause, Frank (Civil engineer)2
- La Caille, Nicolas Louis de, 1713-17622
- Lagrive, Jean de, 1689-17572