Sebastian Olderheim (born 8 July 2007) is a Norwegian professional footballer who plays as a midfielder for the Norwegian First Division club Stabæk.
[1] Olderheim is a youth product of Stabæk.
On 29 August 2022, he signed his first professional contract with Stabæk.
On 20 September 2023, he extended his contract with the club until 2026.
[2] He made his senior and professional debut with Stabæk as a late substitute in a 4–0 Eliteserien loss to Bodø/Glimt on 5 November 2023.