Alembert and its variants may refer to:
People: Jean le Rond d'Alembert (1717–1783), French mathematician, mechanician, physicist, philosopher, and music theorist Sandy D'Alemberte (1933–2019), American lawyer and politician
Places: D'Alembert (crater), a lunar impact crater
Mathematics and Physics: d'Alembert's formula, a mathematical formula d'Alembert's paradox, a statement concerning inviscid flow d'Alembert's principle, a statement of the fundamental classical laws of motion d'Alembert–Euler condition, a mathematical and physical condition D'Alembert operator, an operator of the Einstein equation Ratio test, also known as d'Alembert's test, a test for the convergence of a series