Encyclopedias, Almanacs, Transcripts, and Maps
- Ledbetter, Huddie
- Leenhardt, Maurice
- Leeser, Isaac
- Leeuw, Gerardus van der
- Left and Right
- Legalism
- legion of honour
- Legitimation
- 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