Marvin Valdimarsson (born 11 August 1981) is an Icelandic former basketball player. At the peak of his career, he was known as a high-scoring forward, leading the 1. deild karla in scoring in 2009, when he was also named as the Player of the Year, and coming in second in scoring in the ÃÂrvalsdeild karla in 2010. After joining Stjarnan in 2010, he won the Icelandic Basketball Cup twice, in 2013 and 2015. In 2015, he won the last edition of the Icelandic Company Cup. He last played for Ungmennafélag ÃÂlftaness in 2018.
Marvin's brother is basketball player Sæmundur Valdimarsson.