Troilo is an Italian given name or surname, a variant of the Latin name Troilus. Notable people with the name include:
Given name Troilo I de' Rossi (1462–1521), Italian condottiero and marquess Troilo Agnesi (fl. 1482–1510), Italian Roman Catholic prelate Troilo Orsini (1547–1577), Italian nobleman
Surname Aníbal Troilo (1914–1975), Argentine tango musician Ettore Troilo (1898–1974), Italian Resistance leader during World War II Mariano Troilo (born 2003), Argentine footballer