Oskar Spiten-Nysæter (born 29 August 2007) is a Norwegian professional footballer who plays as a forward for the Norwegian First Division club Stabæk.
Spiten-Nysæter is a youth product of his local club Asker, before moving to the academy of Stabæk in 2021.
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.
[1] He made his senior and professional debut with Stabæk in a 2–2 Eliteserien tie with Sarpsborg 08 on 29 October 2023, and in doing so became their youngest debutant ever at the age of 16 years and 61 days.