Cazalet is a surname. Notable people with the surname include:
Auguste Cazalet (1938–2013), French politician Sir Edward Cazalet (born 1936), British judge Edward Cazalet (merchant) (1827–1883), British merchant and industrialist Clement Cazalet (1869–1950), British tennis player Hal Cazalet (born 1969), English tenor opera singer Lara Cazalet (born 1973), English actress Peter Cazalet (Royal Navy officer) (1899–1982), English admiral Peter Cazalet (racehorse trainer) (1907–1973) English cricketer, jockey, racehorse owner and trainer Thelma Cazalet-Keir (1899–1989), British feminist and politician Colonel Victor Cazalet (1896–1943), British politician William Marshall Cazalet (1865–1932), British socialite and tennis player
See also The Cazalets, a 2001 British television drama series Puyol-Cazalet, a commune in the Landes department, Aquitaine, southwest France