Marcus Andreas Danielson (born 8 April 1989) is a Swedish professional footballer who plays as a defender for Allsvenskan club Djurgårdens IF.

[3] Danielson gained considerably more playing time at Västerås SK and by the 2010 league season he was integral part of the team that won the division title and promotion into the Superettan.

[5] While at Västerås, Danielson played center back alongside his future Sweden international teammate Victor Nilsson Lindelöf.

[14] On 28 February 2020 Danielson became Djurgården's most expensive outbound transfer ever, when he was sold to the Chinese club Dalian Professional for more than 50 million SEK.

[18] On 7 October 2019, Danielson was called up by to the Sweden national team squad for the UEFA Euro 2020 qualifying games against Malta and Spain as a replacement for the injured central defender Pontus Jansson.

[22] He was named in Sweden's UEFA Euro 2020 squad in May 2021, and started in all three group stage games alongside Victor Lindelöf as a centre back.