Giannetti is a surname. Notable people with the surname include:

• Alfredo Giannetti (1924–1995), Italian screenwriter and film editor
• Alyssa Giannetti (born 1994), American footballer
• Eduardo Giannetti da Fonseca (born 1957), Brazilian economist and author
• Filippo Giannetti or Giannetto (1630–1702), Italian painter
• John A. Giannetti Jr. (born 1964), American politician
• Niccolò Giannetti (born 1991), Italian footballer
• Louis Giannetti or giante is a Professor Emeritus of English and Film creator. He has taught courses in film, literature, drama, writing, and humanities.

• Gianetti

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