Leopoldo Federico (12 January 1927 – 28 December 2014) was a distinguished Argentine bandoneon player, arranger, director, and composer, renowned for his contributions to the tango genre. Born in the Balvanera district of Buenos Aires, Federico grew up in a modest family where music was a significant presence, thanks to his father, a part-time bandoneonist. Federico's musical journey began when his uncle introduced him to the bandoneon, leading him to study under notable teachers such as Félix Lipesker and Francisco Requena.

Federico's professional career took off in 1944 when he joined the Di Adamo-Flores orchestra, performing at the Cabaret Tabaris. He subsequently played with several prominent orchestras, including those led by Juan Carlos Cobián, Alfredo Gobbi, and Osmar Maderna. In 1955, he joined Astor Piazzolla's Octeto Buenos Aires and formed his own orquesta típica, making numerous recordings with singer Julio Sosa.

In 1966, Federico collaborated with renowned tango guitarist Roberto Grela to form the Cuarteto San Telmo. Throughout his career, he was associated with many leading orchestras and musicians, including Aníbal Troilo, Carlos di Sarli, and Horacio Salgán. Federico's finesse as a performer and his contributions as a composer and arranger have cemented his legacy as one of the greatest bandoneonists in the history of tango. He passed away on December 28, 2014, at the age of 87.