Encyclopedias, Almanacs, Transcripts, and Maps
- Lobo, Hélio (1883–1960)
- Lobo, Rebecca Rose
- Loeb, Henry, III
- Logic and Inference in Indian Philosophy
- Logic and the Foundations of Mathematics
- Logic Diagrams
- Logic in the Islamic World
- Logic Machines
- Logic, History of
- Logic, Non-Classical
- Logic, Traditional
- Logical Form
- Logical Knowledge
- Logical Paradoxes
- Logical Terms
- Logical Terms, Glossary of
- Lohamei Herut Yisrael
- Loi Cadre
- Loisy, Alfred (1857–1940)
- Lombardi, Vincent Thomas ("Vince")