Aleardo Terzi (1870–1943) was an Italian illustrator and artist.
Terzi was born in Palermo. He died in Castelletto sopra Ticino in 1943.
As an illustrator, Terzi was described as bringing Art Nouveau poster design to a world class level. He produced work throughout his life, notably for the Italian poster company Casa Ricordi. Most of his work was destroyed in the 1960s when the company cleared its warehouses.
He worked as an illustrator for a Rome daily called La Tribuna Illustrata. He illustrated an Italian versions of Little Lord Fauntleroy and Gulliver's Travels.
His brother, Amedeo John Engel Terzi (1872–1956), was also an artist (illustrator and entomologist specialising in Diptera).