Diego Nicolás Riolfo Pérez (born 8 January 1990 in Montevideo), is a Uruguayan professional footballer who plays as a forward.
Riolfo spent his first year as a senior with Central Español, making his debut on 28 August 2010, against Cerro. He scored his first professional goal on 4 December, against Danubio. In the 2011 summer he joined Montevideo Wanderers, but found his chances limited, only making six appearances in the whole season.
In July 2012, Riolfo moved abroad, signing a one-year loan deal with Recreativo de Huelva. On 8 September he made his debut for Recre, against Real Murcia.