d'Alembert may refer to:
- Jean le Rond d'Alembert
- the d'Alembert operator, named after the former
- d'Alembert's principle, also named after the above
- d'Alembert's equation, also named after the above
- d'Alembert's formula, also named after the above
- d'Alembert's theorem, another name for the fundamental theorem of algebra, also named after the above.
- a d'Alembert (crater), also named after the above
- Family D'Alembert, a series of science fiction novels