Orestis Kiomourtzoglou (Greek: Ορέστης Κιομουρτζόγλου; born 7 May 1998) is a German professional footballer who plays as a midfielder for 3.

Born in Munich,[1] of Greek descent, he began his career in 2005 as a seven-year-old in the youth department of SpVgg Unterhaching.

[2] After playing in the various youth teams of Unterhaching, he made his senior debut on 17 July 2015, the first matchday of the 2015–16 season, in a game against FC Ingolstadt II in the Regionalliga Bayern, as an 84th-minute substitute for Maximilian Bauer.

[4] In the second match against Karlsruher SC during the season, a 3–1 loss on 20 January 2018, Kiomourtzoglou scored his first professional goal.

[5] After playing fourteen years for Unterhaching, and making 94 first-team appearances for the team,[6] Kiomourtzoglou signed with Dutch Eredivisie club Heracles Almelo in June 2019.