Mauritz Kåshagen (born 15 February 1989) is a Norwegian sprinter and a four-time national champion in the 400 metres indoors.

[3] His time of 46.88 seconds in January 2016 was briefly the national indoor record before Karsten Warholm broke it later that year.

[1][2] Kåshagen was raised in Ringsaker and began competing at the national level in 2008, when he got silver medals at the indoor and outdoor Norwegian Athletics Championships in the 400 metres.

His 400 metres time stood as the Norwegian indoor national record until Olympic gold medalist Karsten Warholm broke it later in the season.

[5] Kåshagen was nonetheless invited to competed on the 4 × 400 m relay, where his team finished last place in the heats despite being led off by Karsten Warholm.