Marcus Thomsen (born 7 January 1998 in Voss) is a Norwegian athlete specialising in the shot put.

He also reached the final at the European Indoor Championships finishing seventh.

His family moved from Voss to Aarhus, Denmark in 2012, and Thomsen spent his teenage years there.

[2] His personal bests in the event are 21.03 metres outdoors, achieved in June 2020 at Oslo, and 21.09 metres indoors, achieved in February 2021 at Växjö, Sweden, which is also the national record.

This biographical article relating to Norwegian athletics is a stub.