Jules Denis Onana (born 12 June 1964 in Yaoundé) is a retired Cameroonian football player. He is the brother of Elie Onana. He played for the club Canon Yaounde, and also took part in the 1990 FIFA World Cup, playing 3 of the 5 matches of the Cameroon national football team. He decided to retire in 2005 after he played in several clubs in Cameroon, France and Indonesia with Pelita Jaya. After retirement, he served as the player agent in Asian countries. He had 56 caps for Cameroon national football team.