Sigismondi is a surname. Notable people with the surname include:
Etelwardo Sigismondi (born 1974), Italian politician Floria Sigismondi (born 1965), Italian-Canadian film director, screenwriter, artist, and photographer Pietro Sigismondi (1908–1967), Italian Catholic prelate and diplomat
See also Sigismondo, opera by Rossini Sigismondo (given name)