Ilias Kostis is a 24-year-old professional football player from GRE. He currently plays for Atletico Madrid, wearing the number 27 shirt. At the international level, he represents Greece U21. He plays primarily as a Defender. He stands at 192cm tall and weighs 82kg. His current market value is estimated at 500K €.

His most recent move was a from Atletico de Madrid U19 to Atletico de Madrid B on 2022-07-01.

Throughout the La Liga 2025-2026, Ilias Kostis featured in 1 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.