Marius Thorp (born 28 June 1988) is a Norwegian professional golfer. Thorp had a successful amateur career, winning the European Amateur in 2005 and claiming the silver medal for lowest amateur in the 2006 Open Championship. He turned professional in 2007 and had immediate success, claiming four wins on mini-tours in Scandinavia. In 2010 Thorp joined the Challenge Tour and found further success at that level, with six top-10s in his debut season. He ended 2010 16th in the standings, which earned him a European Tour card for 2011. He hails from Bærum and represented the local golf club Bærum GK.