L
- La Sabliere, Marguerite Hessein de
- La Vallière, Louise-Françoise de la Baume Le Blanc, marquise de
- Lacan, Jacques
- Lambert, Anne-Thérèse Marguenat de Courcelles, marquise de
- Lambda Calculi
- Language and Frege
- Language of Thought Hypothesis
- Language, Knowledge of
- Language, Philosophy of
- Language, Religious
- Laozi (Lao-tzu)
- Law and Economics
- Law, Philosophy of
- Laws of Nature
- Legal Positivism
- Legal Pragmatism
- Leibniz, Gottried Wilhelm
- Lenclos, Ninon de
- Leucippus
- Lewis, Clarence Irving
- Liar Paradox
- Libertarianism
- Liezi (Lieh-tzu)
- Lipsius, Justus
- Literary Theory
- Locke, John
- Logic, Paraconsistent
- Logic, Propositional
- Logical Consequence
- Logical Paradoxes
- Lokāyata/Cārvāka – Indian Materialism
- Lombard, Peter
- Lonergan, Bernard
- Lotze, Rudolf Hermann
- Love, Overview of Philosophy of
- Lucas-Penrose Argument about Gödel’s Theorem
- Lucretius
- Luther, Martin
- Lyotard, Jean-Francois
