Leonardo Jose Talamonti (born November 12 1981 in Alvarez, Santa Fe) is an Argentine football defender.
Talamonti began his career with Rosario Central in the city of Rosario in Argentina, after making nearly 100 appearances for the club he was sold to Italian Serie A side S.S. Lazio but after only one year in Italy he returned to Argentina to play for River Plate. Since the summer of 2006 he has been on loan at Atalanta B.C..