Željko Mijač (13 January 1954 – 14 February 2022) was a Croatian football manager and player.

[1] For Rijeka, Mijač played 117 official games (102 of them in the league), scoring 15 goals.

He then worked as assistant coach of Bahrain national team, Hajduk Split, Persepolis and Rah Ahan.

During his tenure at Rah Ahan, he managed a single match during 2011–12 Iran Pro League when the team's coach, Ali Daei was one of the guests of 2011 FIFA Ballon d'Or at Zürich and couldn't coach the team in the next day's match.

In January 2020, he was appointed manager of Croatian third tier-club Urania Baška Voda,[3] only to be sacked and replaced by former Australia goalkeeper Zeljko Kalac in October 2021.