Ignacio Mieres (born April 6, 1987, in Buenos Aires) is an Argentine rugby union player.

He previously played for Worcester Warriors in the RFU Championship Mieres was signed on trials for Leicester Tigers in March 2008.

After only being able to play sevens for the Tigers, Loffreda got sacked from Leicester and Mieres decided to move forward.

When the season finished, Mieres was released and went back to Argentina, where he played for the Pampas for a couple of months before moving to Exeter Chiefs.

For 2011/2012 Mieres was picked as the first-choice number 10 for the Chiefs scoring over 270 points across Premiership and Amlin Challenge Cup matches.