Fassi is a surname. Notable people with the surname include:
Abdelkader Fassi Fehri (born 1947), Moroccan linguist
Aphelele Fassi (born 1998), South African professional rugby union player
Carlo Fassi (1929–1997), Italian figure skater and international coach
Farida Fassi, Moroccan professor of physics
Hatoon al-Fassi (born 1964), Saudi Arabian historian, author and women's rights activist Juan Pablo Fassi (born 1994), retired professional Mexican footballer Imam Fassi (1760?–1863), originator of the Fassi family of Sheikhs María Fassi (born 1998), Mexican professional golfer Sebastián Fassi (born 1993), Mexican professional footballer Sonwabile Fassi (born 1991), South African former cricketer
Al Fassi
Allal al-Fassi (1910–1974), Moroccan politician, writer, poet and Islamic scholar Taieb Fassi Fihri (born 1958), Moroccan politician Mohammed al Fassi (1952–2002), Saudi businessman Malika al-Fassi (1919–2007), Moroccan writer and nationalist