Marc Dos Santos (born May 30, 1977) is a Canadian soccer manager who is currently the manager of the Ottawa Fury FC of the North American Soccer League. He came to the Fury after having been the technical director of Desportivo Brasil. Dos Santos was the head coach of the Montreal Impact in the D2 Pro League from 2009 until his resignation in June 2011. Dos Santos is of Portuguese ancestry.
During the 2008 CSL season Dos Santos led the Attak to claim the National Division title, the first Division title to be won by the club. For the second year in a row the Attak gained a playoff berth, eventually reaching the finals of the CSL Cup, where once again the Attak were defeated by White Eagles (this time on penalty kicks).
On November 5, 2008, Dos Santos stepped down as head coach of Trois-Rivières, and accepted an assistant coach position with the Montreal Impact under head coach John Limniatis. In May 2009, Limniatis was fired and Dos Santos named as interim head coach. Later that year, Dos Santos was named head coach and remained in that position until his resignation on June 28, 2011.