Marcus Becker (born 11 September 1981 in Merseburg) is a German slalom canoeist who competed at the international level from 1996 to 2011. He won a silver medal in the C2 event at the 2004 Summer Olympics in Athens.
Becker won six medals at the ICF Canoe Slalom World Championships with a gold (C2: 2003), four silvers (C2: 2006, C2 team: 2003, 2006, 2009), and a bronze (C2: 2005). He also won a gold and two silvers in the C2 team event at the European Championships.
His partner in the C2 boat throughout his career was Stefan Henze.