John "Johnny" Koutroumbis (born 6 March 1998) is an Australian professional soccer player who plays as a right back for Scottish Premiership club Motherwell.

[3] In July 2021, Koutroumbis joined Western Sydney Wanderers on a two-year deal.

[4] After making 17 league appearances, his contract was mutually terminated in July 2022.

[7] On 15 June 2024, it was announced that Koutroumbis would join Scottish Premiership club Motherwell on a free transfer on 1 July, signing a two-year contract.

[9] In 2018, Koutrombis was temporarily sidelined after being diagnosed with stage 1 thyroid cancer.