Tassi or Tasso or Tassis is an Italian surname. Notable people with the surname include:
Agostino Tassi (1578–1644), Italian painter Attila Tassi (born 1999), Hungarian racing driver Edoardo Tassi (born 1998), Italian football player Filomena Tassi, Canadian politician Francesco Maria Tassi (1716–1782), Italian art historian Lorenzo Tassi (born 1995), Italian footballer Madonna Tassi, Canadian singer Matteo Tassi (1831–1895), Italian painter Maria Aurelia Tasso or Tassis, 18th-century Benedictine nun and writer Bernardo Tasso Torquato Tasso Omodeo Tasso