Ignacio Fernandez Rouyet (born 22 October 1978 in Buenos Aires) is an Argentina-born Italian rugby union player.
Rouyet, who is a prop, played for Rugby Viadana before signing for Benetton Treviso in 2009. He made his debut for Italy against South Africa in Cape Town on 21 June 2008. He had 7 caps, the last one being in 2009.