Cavalieri is an Italian surname. Notable people with the surname include:
Bonaventura Cavalieri (1598–1647), Italian mathematician Caterina Cavalieri (1755–1801), Austrian opera soprano Diego Cavalieri (born 1982), Brazilian footballer; goalkeeper for Crystal Palace F.C. Emilio de' Cavalieri (1550–1602), Italian composer of the late Renaissance Grace Cavalieri (born 1932), American poet and playwright Joey Cavalieri, American comic book writer and editor Lina Cavalieri (1874–1944), Italian opera soprano Paola Cavalieri (born 1950), Italian philosopher Tommaso dei Cavalieri (c. 1508–1587), Italian friend of Michelangelo
See also Cavalieri's principle Cavalieri's quadrature formula