Giovannetti is an Italian surname, derived from the given name Giovanni. Notable people with the surname include:
Alberto Giovannetti (1913–1989), Vatican diplomat Andrea Gioannetti (1722–1800), Roman Catholic bishop and cardinal Julien Giovannetti (1914–1966), French operatic baritone Lilia Giovannetti (1929–2019), Italian actress Luciano Giovannetti (born 1945), Italian sport shooter Luciano Giovannetti (born 1934), Italian Catholic bishop Luigi Pericle Giovannetti or Luigi Pericle (1916–2001), Swiss painter, cartoonist and illustrator Marco Giovannetti (born 1962), Italian cyclist Matteo Giovannetti or Giovanetti (c.1322–1368), Italian painter Raffaelle Giovannetti (1822–1911), Italian painter