Guillet is a surname. Notable people with the surname include:
Adolphe Guillet dit Tourangeau (1831–1894), Quebec notary and politician Amedeo Guillet (1909–2010), Italian Army officer Jean-Jacques Guillet (born 1946), French politician Léon Guillet (1873–1946), French metallurgist Louis Guillet (1788–1868), Quebec notary and politician George Guillet (1840–1926), Canadian politician Pernette Du Guillet (c.1520–1545), French poet Valère Guillet (1796–1881), Quebec notary and politician
See also Gullett