Sebastian Hein Barthold (born 27 August 1991) is a Norwegian handball player. He plays for SC Magdeburg and the Norwegian national team.
Barthold started playing handball at the age of 6 in Haslum. He started his career as a pivot, before he was retrained as a left wing. In the 2009-10 season he made his debut for Haslum HK, and in his first season he won the Norwegian Championship.
In 2017 he joined Danish side Aalborg HÃÂ¥ndbold. Here he won the Danish Championship in 2019, 2020, 2021, 2024 and the Danish Cup in 2018. In 2021 he reached the final of the EHF Champions League, where Aalborg lost to FC Barcelona. In 2025 he won the Danish Cup with Aalborg HÃÂ¥ndbold. Later the same season he won the Danish championship, winning his first double.
In 2025 he joined German top club SC Magdeburg on a 1-year contract.
<sup>1</sup><small>Including Championship playoffs</small>
Barthold made his debut for the Norwegian national team on 3 April 2012 against Iceland. He represented Norway at the 2022 European Men's Handball Championship. During the tournament he scared 42 goals, when Norway reached 5th place.
At the 2025 World Championship he got a 10th place finish with Norway, scoring 13 goals in 6 games.
Barthold is in a relationship with former international handballer Line Bjørnsen, making him a brother-in-law to team mate on the national team, Kristian Bjørnsen.