Giannetto is a name. Notable people with the name include:
* Giannetto, a character in the Italian opera ''
La gazza ladra
''La gazza ladra'' (, ''The Thieving Magpie'') is a ''melodramma'' or opera semiseria in two acts by Gioachino Rossini, with a libretto by Giovanni Gherardini based on ''La pie voleuse'' by Théodore Baudouin d'Aubigny and Louis-Charles Caigni ...
''
*
Giannetto De Rossi
Giannetto De Rossi (8 August 1942 – 11 April 2021) was an Italian makeup and special effects artist for motion pictures. His career included work for several high-profile directors, including Bernardo Bertolucci, Sergio Leone, Federico Felli ...
(1942–2021), Italian makeup and special effects artist
*
Giannetto Termanini, Italian Olympic gymnast
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Giannetto Valli (1869–1927), Italian politician
*
Randal Giannetto (born 1956), American politician
{{Given name, type=both