Ilias Koutsoupias (; born 10 May 2001) is a Greek professional footballer who plays as a midfielder for club Frosinone.
Koutsoupias moved to Italy at the age of 16.
He made his Serie B debut for Virtus Entella on 3 October 2020 in a game against Reggiana. He substituted Marco Crimi in the 86th minute. He made his first start for Entella on 20 October 2020 against Frosinone.
On 1 September 2021, Ternana announced the acquisition of 20-year-old central midfielder Ilias Koutsoupias on a long-season loan from Virtus Entella. Although there was a lot of interest from Serie A clubs and the former Bologna midfielder was ready for the big step, it seems that this will take a year longer. On 12 March 2022, he scored his first goal with the club in a 2âÂÂ0 home win game against Cosenza Calcio.
On 5 July 2022, Koutsoupias moved to Benevento on loan with an obligation to buy.
On 19 August 2023, Koutsoupias was loaned by Benevento to Bari.
On 18 July 2024, Koutsoupias signed a contract with Catanzaro for three seasons, with an option for a fourth. On 15 January 2025, Koutsopias moved to Frosinone on loan, with a conditional obligation to buy.
His father, Georgios Koutsoupias, is a former professional footballer.