Encyclopedias, Almanacs, Transcripts, and Maps
- Liu Deren
- loach
- Loading
- Local Climatological Data Reports
- Local Winds
- loch
- Logistic Growth
- Logrunners and Chowchillas (Orthonychidae)
- Loisy, Alfred
- Lomborg, Dr. Bjørn (1965 – ) Danish Political Scientist
- Lonergan, Bernard
- long jump
- Long-tailed Titmice (Aegithalidae)
- longest rail and road tunnels
- longest rivers
- Lopez, Barry Holstun (1945 – ) American Environmental Writer
- Lophiiformes (Anglerfishes)
- Lophogastrida (Lophogastrids)
- Lord of the Animals
- Lords