Marcus Nilsson (born 3 May 1991 in Malmö) is a Swedish decathlete.

[1] He grew up in a sports family where both his father Carl-Gustaf ”Calle” and mother Katarina competed at an elite level.

His brother David and two sisters, Ida and Johanna, have belonged to the Swedish national team in athletics.

At the 2002 Swedish cross country championships the family walked home with four gold medals, one silver and one bronze.

[2] This biographical article relating to Swedish athletics is a stub.