L
- Frank Fortescue Laidlaw (1876–1963), from United Kingdom
- Jean-Baptiste Lamarck (1744–1829), from France
- Aurèle La Rocque, from Canada
- Charles Francis Laseron (1887–1959), from America/Australia
- Isaac Lea (1792–1886), from the USA
- José H. Leal, from Brazil
- Michele Lessona (1823–1894), from Italy
- Jan Lever nl:Jan Lever (bioloog) (born 1922), from the Netherlands
- John Lightfoot (biologist) (1735–1788), from United Kingdom
- Ilya Mikhailovich Likharev (1917–2003), from Russia
- David R. Lindberg (born 1948), from the USA
- Karl Emil Lischke – de:Karl Emil Lischke fr:Karl Emil Lischke (1813–1886)
- Arnould Locard - (1841–1904) from France
- Richard Thomas Lowe (1802–1874), from United Kingdom
- Sven Ludvig Lovén (1809–1895), Swedish marine zoologist and malacologist
- Dochiţa Lupu, Romanian malacologist
Read more about this topic: Malacologist