Carlos Alberto Gianelli Derois (Montevideo, March 7, 1948) is a Uruguayan lawyer and diplomat.
According to his curriculum vitae (CV) he has been Uruguayan ambassador to Saudi Arabia, Mexico, the Netherlands, and the United States of America (2005-2012), and acted for Uruguay at The Hague during the Uruguay River pulp mill dispute.
On July 23, 2015 he was reappointed Ambassador of Uruguay to the United States where he was accredited on August 3, 2015.