Cazalet is a surname. Notable people with the surname include:
Auguste Cazalet (1938–2013), member of the Senate of FranceClement Cazalet (1869–1950), British tennis playerHal Cazalet (born 1969), English tenor opera singerLara Cazalet (born 1973), English actressPeter Cazalet (1899-1982), English admiralPeter Cazalet, (1907-73) English cricketer, jockey, racehorse owner and trainerThelma Cazalet-Keir CBE, née Cazalet (1899–1989), British feminist and Conservative Party politicianColonel Victor Cazalet MC (1896–1943), British Conservative Party Member of Parliament