Proietti is an Italian surname. Notable people with the surname include:

• Biagio Proietti (1940–2022), Italian screenwriter, director and writer
• Cristiana Proietti, American fashion designer
• Gigi Proietti (1940–2020), Italian actor
• Francesco Cosimi Proietti (1951–2021), Italian politician
• Giovanni Proietti (born 1977), Italian footballer
• Jonathan Proietti (born 1982), Luxembourgian footballer
• Monica Proietti (1940–1967), Canadian bank robber