Leonardo "Leo" Andrés Mainoldi (born March 4, 1985), is an Argentine professional basketball player. He is tall. He plays at the power forward position.
On September 1, 2013, Mainoldi signed a one-year deal with the Spanish EuroLeague club Laboral Kutxa.
Mainoldi has been a member of the senior men's Argentina national basketball team. He won the bronze medal at the 2009 FIBA Americas Championship, the bronze medal at the 2013 FIBA Americas Championship, and the silver medal at the 2015 FIBA Americas Championship.
He also played at the 2016 Summer Olympics.
Leonardo has an older brother, Carlos, who is also a professional basketball player.