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
See also Al-Fasi El Fassi Allal al Fassi Dam, embankment dam on the Sebou River in Morocco Zawiya of Sidi Abdelkader al-Fassi