Leonardo Marquicias was a former Basketball player who competed in the 1956 Summer Olympics in Melbourne, Australia. He played together with Charlie Badion, Piling Barretto, Ramoncito Campos, Bonnie Carbonell, Tony Genato, Eddie Lim, Caloy Loyzaga, Mon Manulat, Nano Tolentino, Martin Urra and Antonio Villamor, led by coach Leo Prieto.

Marquicias died on September 11, 2002 at the age of 71 years old.

1956 Summer Olympics, Melbourne