Jón Dagur Þorsteinsson (born 26 November 1998) is an Icelandic professional footballer who plays as a winger for German 2.
[2] On 25 June 2019, Danish Superliga club AGF announced that they had signed Jón on a three-year contract.
[4] On 27 August 2024, Jón signed a three-season contract with Hertha BSC in Germany.
[5] In October 2018, Jón was named in the Iceland national team's squad for matches against France and Switzerland.
[6] On 7 June 2024, he scored the only goal of an upset 1–0 friendly victory over England at Wembley Stadium.