Agustín Julio Castro (born 25 October 1974) is a Colombian Association football former player, who played as a goalkeeper.

He had won his position after the previous first-choice keeper Miguel Calero allowed nine goals in two games.

In his stint as keeper, he saved Colombia many times during the first two games of qualifiers against Brazil and Bolivia, and was referred to as San Agustín.

However, in a shocking turnaround Agustín Julio managed to regain his place in the Colombian side in the match against Ecuador.

[1] Julio is the great uncle of Wolves and FC Cincinnati defender, Yerson Mosquera.