Julio César Maglione (born November 14, 1935 in Montevideo, Uruguay) is a member of the International Olympic Committee (IOC) from Uruguay. He has been an IOC member since 1996.
Maglione is the current President of the Uruguayan Olympic Committee (Comité Olímpico Uruguayo, COU), and has held the position since 1987. In July 2009, he was elected President of FINA, the International Swimming Federation. As of July 2013, he is about to be reelected for that post.
In September 2012 he was reelected President of the COU for the period 2012-2016.