Massi is a surname. Notable people with the surname include:
Charles Massi (1952–2010), Central African politician
Emidio Massi (1922–2016), Italian politician
Jeri Massi (born 1960), American author
Nick Massi (1927–2000), American singer
Riccardo Massi, Italian operatic tenor
Robert Massi (born 1987), Swedish footballer
Rodolfo Massi (born 1965), Italian cyclist
Souad Massi (born 1972), Algerian singer
Stelvio Massi (1929–2004), Italian film director
Valentina Massi (born 1983), Italian model