Encyclopedias, Almanacs, Transcripts, and Maps
- Kingship: Kingship in East Asia
- Kingship: Kingship in Mesoamerica and South America
- Kingship: Kingship in Sub-Saharan Africa
- Kingship: Kingship in the Ancient Mediterranean World
- Kinjikitile
- Kinorhyncha (Kinorhynchs)
- Kireevskii, Ivan
- Kirtland's Warbler
- Kitagawa, Joseph M.
- Kitti's Hog-Nosed Bats (Craseonycteridae)
- Kiwis (Apterygidae)
- Klimkeit, Hans-Joachim
- Klong Chen Rab 'Byams pa (Longchenpa)
- Knees
- Knob-Scaled Lizards (Xenosauridae)
- knock, engine
- Knots
- Knowledge and Ignorance
- Koalas (Phascolarctidae)
- Kōben