Gianni is an Italian surname. Notable people with the surname include:
Alberto Gianni (1891–1930), Italian diver Armando Umberto Gianni (1939–2026), Italian-born Roman Catholic bishop Dimitrie Gianni (1838–1902), Romanian politician Gary Gianni (born 1954), American comics artist Lapo Gianni (died after 1328), Italian poet Mario Gianni (1902–1967), Italian footballer Matthieu Gianni (born 1985), French footballer Nicolás Gianni (born 1982), Argentine footballer Patrizia Gianni (born 1952), Italian mathematician Paul Gianni, Australian paralympic athlete
See also
Gianni Di Gianni