Marinko Koljanin (born 17 November 1957) is a Croatian football manager, a former footballer and a former general manager of HNK Rijeka who was manager of Al-Nasr in Oman Professional League.
Koljanin worked as an assistant to Otto BariÃÂ at Casino Salzburg and was on the bench during the club's 1994 UEFA Cup final loss when BariÃÂ was suspended. He later worked in the Middle East before taking up his first coaching job in Croatia with Krk in December 2013.
He left his role of vice-president of Orijent to replace Edo Flego as manager of the club's senior team in May 2022.