Roberto Fonseca (born 1975, Havana) is a Cuban jazz pianist. From an early age, Fonseca was surrounded by music: his father was drum player Roberto Fonseca, Sr, his mother, Mercedes Cortes Alfaro, a professional singer (she sings on her son's most recent solo album, Zamazu), and his two older half-brothers from his mother's previous marriage to the great pianist and musician Jesús "Chucho" Valdés are Emilio Valdés (drums) and Jesús "Chuchito" Valdés Jr. (piano), also successful young musicians of great international prestige.

After an early interest in drums, Fonseca switched to piano at the age of 8, and by 14 was experimenting with fusing American jazz and traditional Cuban rhythms; he appeared at Havana's Jazz Plaza Festival in 1991 when he was just 15.