Diego Cuesta Silva (born Buenos Aires, 23 January 1963) is a former Argentine rugby union player. He played as a wing and as a centre. He works as a physician.
Cuesta Silva first played at La Salle, where he had his debut at the Nacional de Clubes, in 1983. He moved to SIC, where he would play from 1985/86 to 1997/98, becoming one of the most popular players and winning 2 titles of the Nacional de Clubes, in 1993 and 1994.. He also played for Unión de Rugby de Buenos Aires, winning 6 times the Campeonato Argentino, in 1983, 1985, 1987, 1991, 1993 and 1995.
He had 65 caps for Argentina, from 1983 to 1995, scoring 28 tries, 125 points on aggregate.