Ronald Odair de Oliveira Julião (born 16 June 1985) is a Brazilian track and field athlete who competes in the shot put and discus throw. He is a member of BM&F Bovespa's track club and is trained by João Paulo Alves da Cunha. He is the Brazilian record holder in the discus throw (65.55 m). He is the second highest ranked South American discus thrower after Jorge Balliengo and has won straight titles at the Brazil championships since 2005.