Eusebio Guiñez (16 December 1906 - 1 October 1987) was an Argentine long-distance runner. Born in Rivadavia, Mendoza, he competed in the 1948 Summer Olympics in the 10,000 metres, which he failed to finish, and the marathon, where he finished fifth. His highest international ranking was 16th in the 10,000 m in the 1946 season, with a time of 31:09.8 minutes.