Guarnieri is an Italian surname. Notable people with the surname include:
Adriano Guarnieri (skier) (1914–1983), Italian alpine skier Adriano Guarnieri (composer) (born 1947), Italian classical composer Albert Guarnieri (1899–1980), American football player Albina Guarnieri (born 1953), Italian-born Canadian politician Anna Maria Guarnieri (born 1933), Italian actress Antonio Guarnieri (1880–1952), Italian classical cellist and conductor Camargo Guarnieri (1907–1993), Brazilian composer Danilo Caro Guarnieri (born 1965), Colombian trap shooter Ennio Guarnieri (1930–2019), Italian cinematographer Gianfrancesco Guarnieri (1934–2006), Brazilian actor, lyricist, poet and playwright Giuseppe Guarnieri (1856–1918), Italian physician Jacopo Guarnieri (born 1987), Italian cyclist Johnny Guarnieri (1917–1985), American musician Luiz Carlos Guarnieri (born 1971), Brazilian footballer Rodolfo Guarnieri (1927–2019), Argentine former sports shooter Umberto Guarnieri (1919–1973), Italian footballer
See also Guarneri, family of luthiers from Cremona