Tomás de Vedia (born May 31, 1982) is an Argentinerugby union player. He plays as a centre.
He is the son of rugby player back row Ricardo "Tacho" de Vedia. He played at the San Isidro Club in Buenos Aires, debuting in the top league of Argentine rugby in 2003. In 2006 he moved to Saracens in England, and in 2007 moved again to London Irish, where he played alongside fellow Argentines Gonzalo Tiesi and Juan Manuel Leguizamón. He debuted for the Argentine national team in June 2007 as a forward against Ireland but was not selected for the 2007 World Cup. He had 3 caps, without scoring, until 2008. He also played for Argentina Jaguars.
After being released by London Irish, he has since moved back to Argentina to play for SIC.