Hallett is a surname. Notable people with the surname include:
Andy Hallett (1975–2009), American actorBenjamin F. Hallett (1797–1862), was a Massachusetts lawyer, first chairman of the Democratic National CommitteeCecil Hallett (1899–1994), British trade unionistGeorge E. Hallett, architect with Hallett & Rawson, IowaGeorge E. A. Hallett (1890–1982), pioneer aviatorGeorge Hallett (photographer) (born 1942), South African photographerHarold Foster Hallett, British philosopherHoward Hallett, Australian rugby league footballerJob H. Hallett (1855–1940) founded J. Hallett and Son, South Australian brickmakersJohn Hallett (1772–1794) sailor on HMS Bounty, accompanied Bligh after mutinyJohn Hallett (Australian politician) (1917–1999) Western Australian politicianJohn Hallett (South Australian politician), (1804–1868) businessman pastoralist and landownerMacauley Hallett, English rugby league footballerMark Hallett (artist) (born 1947), illustrator specializing in dinosaursMark Hallett (historian) (born 1965), art historian specializing in British artMoses Hallett (1834–1913), US federal judgeSamuel Hallett, railroad developerStanley Hallett (1930–1998), American urban planner