Tommasi is an Italian surname. Notable people with the surname include:
Adolfo Tommasi (1851–1933), Italian painter
Alejandro Tommasi (born 1957), Mexican television, stage and film actor
Angiolo Tommasi (1858-1923), Italian painter
Bruno Tommasi (1930–2015), Italian Roman Catholic bishop
Corrado Tommasi-Crudeli (1834–1900), Italian physician
Damiano Tommasi (born 1974), former Italian football player, current president of the Italian Footballers' Association
Giovanni Battista Tommasi (1731–1805), Italian nobleman and 73rd Prince and Grand Master of the Order of Malta
Giovanni Tommasi Ferroni (born 1967), Italian artist
Joseph Tommasi (1951–1975), American National Socialist
Joseph Tommasi (Communist) (1886–1926), early leader of the French Communist Party
Ludovico Tommasi (1866–1941), Italian painter
Ludovik Mifsud Tommasi (1796–1879), Maltese priest and writer
Luiz Roberto Tommasi, Brazilian zoologist
Rodolfo Tommasi (born 1946), Italian journalist, writer and essayist
Sara Tommasi, Italian former actress and television personality
