Hernán Oscar Cortínez (born August 4, 1973 in Morón) is a male marathon runner from Argentina, who is a two-time winner of the Buenos Aires Marathon in his native country (2003 and 2004). He represented Argentina in the men's marathon at the 2000 Summer Olympics in Sydney, Australia. He won the gold medal in the short race at the 2001 South American Cross Country Championships. He retired in 2012.