Gillett is a surname. Notable people with the surname include:
Aden Gillett (born 1958), British actor
Alan Gillett (disambiguation)
Amy Gillett (1976–2005), Australian track cyclist and rower
Burt Gillett (1891–1971), American director of animated films
Charlie Gillett (1942–2010), British radio presenter, musicologist and writer
Dave Gillett (born 1951), Scottish retired footballer
Emma Gillett (1852–1927), American lawyer and women's rights activist
Frederick H. Gillett (1851–1935), former US Speaker of the House, US Representative and US Senator from Massachusetts
George Gillett (disambiguation)
Sir Harold Gillett, 1st Baronet (1890–1976), Lord Mayor of London
James B. Gillett (1856–1937) Texas Ranger
James Gillett (1860–1937), Republican politician and 22nd Governor of California from 1907 to 1911
Jarred Gillett (born 1986), Australian football (soccer) referee
George N. Gillett, Jr. (born 1938), American businessman, owner of various sports teams
Mark Gillett, British software engineer and executive
Mary Gillett (born 1958), Australian former politician
Matt Gillett (born 1988), Australian Rugby League player
Matthew Gillett (born 1983), Australian soccer referee
Sir Michael Cavenagh Gillett (1907–1971), British ambassador
Michael Gillett (born 1973), Australian former rugby league player
Nicholas Gillett (disambiguation)
Sir Robin Gillett (1925–2009), British merchant navy captain, Lord Mayor of London
Sarah Gillett (born 1956), British ambassador
Simon Gillett (born 1985), English footballer
