Encyclopedias, Almanacs, Transcripts, and Maps
- Law and Religion: Law, Religion, and Morality
- Law and Religion: Law, Religion, and Punishment
- Law and the Prophets
- Law Society
- Lawn Treatment
- Lawrence, Peter
- Layers of the Ocean
- Leach, Edmund
- Lead Management
- Lead Shot
- leaf hopper
- Leafy Spurge
- League of Conservation Voters
- Leakey, Louis Seymour Bazett (1903 – 1972) African-Born English Paleontologist and Anthropologist
- Leakey, Mary Douglas Nicol (1913 – 1996) English Paleontologist and Anthropologist
- Leakey, Richard Erskine Frere (1944 – ) African-Born English Paleontologist and Anthropologist
- Leaking Underground Storage Tank
- least populous countries
- Leatherback Seaturtles (Dermochelyidae)
- Leclanché cell