Villani is an Italian surname. The surname can also be found in France. Notable people with the surname include:
Anna Villani (born 1966), Italian marathon runner
Carmen Villani (born 1944), Italian pop singer
Cédric Villani, French mathematician
Elyse Villani (born 1989), Australian cricketer
Filippo Villani, Florentian chronicler
Giovanni Villani, Florentian banker, official, diplomat and chronicler
Mitchell Villani (born 1987), Australian ice hockey player of Italian ancestry
Pat Villani (1954–2011), American computer programmer and author