Gilardo Gilardi (May 25, 1889 - January 16, 1963) was an Argentine composer, pianist, and conductor who was the eponym of the Gilardo Gilardi Conservatory of Music in La Plata, Buenos Aires.

He was born in San Fernando, Argentina, and first learned music from his father before studying with the composer Arturo Berutti in Buenos Aires. He began composing as a teenager and he premiered his first opera, Ilse, in the Colón theatre, aged 23. He co-founded the group Renovación (Renovation) in 1929, but left three years later, in 1932. He was professor at the University of La Plata and wrote an elementary course on harmony. Some of his works are the operas Ilse (1923) and La leyenda del Urutaú (The legend of the Urutaú) (1935), Primera serie argentina, (First Argentine series), Evocación quechua, Gaucho con botas nuevas (Gaucho with new boots) (1938, orchestra), a symphonic poem which won a national prize in 1939. Among his religious music Réquiem (1933) and Misa de Gloria (Glory Mass) (1936) are particularly esteemed. He also composed chamber music pieces: Sonata for violin and piano, Songs for voice and piano, Argentine popular Sonata for violin and piano and various piano pieces.