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Markus Oscarsson (born 9 May 1977 in Västerås) is a Swedish sprint kayaker who has competed since 1995. Competing in five Summer Olympics, he won two medals in the K-2 1000 m event with a gold in 2004 and a silver in 2000.
Oscarsson won two silver medals at the 1995 World Junior Championships in Yamanashi, Japan, finishing behind Hungary's Zoltan Kammerer in both the K-1 500 m and K-1 1000 m finals.
He then formed a highly successful K2 partnership with Henrik Nilsson. They went on to become world champions in 2002 and 2003. They also won a bronze in the K-2 500 m event at the 2001 championships. It was with Nilsson that he won his gold and silver Olympic medals. At the 2012 Summer Olympics, Oscarsson and Nilsson reached the final of the men's K-2 1000 m event, but finished in 5th place.
Oscarsson is 184 cm (6' 0) tall and weighs 84 kg (185 lb).