Encyclopedias, Almanacs, Transcripts, and Maps
- Lehmann, Edvard
- Lemminkäinen
- Lemurs (Lemuridae)
- Lenshina, Alice
- Leo I
- Leontius of Byzantium
- Leopold, Aldo (1886 – 1978) American Conservationist, Ecologist, and Writer
- Lepidoptera (Butterflies, Skippers, and Moths)
- Lepidosireniformes (Lungfishes)
- Lepisosteiformes (Gars)
- Leptodactylid Frogs (Leptodactylidae)
- Lesbianism
- Lessing, G. E.
- Leuba, James H.
- Levi Yitsḥaq of Berdichev
- Lévi, Sylvain
- Lewis, Warren K. (1882–1975)
- Li Shaojun
- Liang Wudi
- Libation