Alfredo Deza Ganoza (born 24 August 1979) is a former Peruvian athlete specializing in the high jump. He is best known for winning gold at the 1998 World Junior Championships becoming the country's first and so far only World Junior Championships medalist.
He represented his country at the 2004 Olympic Games in Athens failing to progress to the final.
His personal best jump is 2.27 metres from 2003. His father, Alfredo Deza Fuller, was also an Olympic athlete competing in the 110 metres hurdles.