D
- d’Andilly, Angélique de Saint Jean Arnauld
- Dacier, Anne Le Fèvre
- Dai Zhen (Tai Chen)
- Damon
- Daoist Philosophy
- Davidson, Donald Herbert
- De Beauvoir, Simone
- De Chantal, Jeanne-Françoise Frémyot, Baronne
- De Sévigné, Marie de Rabutin-Chantal, Marquise
- Death Penalty
- Deconstruction
- Deduction, Natural
- Deductive and Inductive Arguments
- Deductive-Theoretic Conceptions of Logical Consequence
- Defeaters in Epistemology
- Definitions, Predicative and Impredicative
- Deism, English
- Deism, French
- Deleuze, Gilles
- Democritus
- Demonax
- Demonstratives and Indexicals
- Derrida, Jacques
- Descartes, René
- Desert
- Deshoulieres, Antoinette
- Design Arguments for the Existence of God
- Determinism, Theological
- Dewey, John
- Dialogical Logic
- Diderot, Denis
- Differential Ontology
- Dignity, Human
- Diogenes Laertius
- Diogenes of Apollonia
- Diogenes of Sinope
- Disjunctivism
- Distributive Justice
- Divine Command Theory
- Divine Immutability
- Divine Simplicity
- Donoso Cortés, Juan
- Doxastic Conservatism
- Doxastic Voluntarism
- Dreaming, Philosophy of
- Du Bois, William Edward Burghardt
- Dualism and Mind
- Duality in Logic and Language
- Dummett, Michael
- Duns Scotus, John
- Durkheim, Émile
- Dynamic Epistemic Logic