Marc, Baron Bossuyt (born 9 January 1944 in Ghent) is a member of the Permanent Court of Arbitration in The Hague and a former judge and president at the Belgian Constitutional Court.
Bossuyt obtained a Dr.iur (LLM) at the University of Ghent in 1968, a Certificate of international relations at Johns Hopkins University in Bologna in 1969, and a PhD in political science from the Graduate Institute of International Studies in 1975.
He was appointed to the Constitutional Court by Royal Order on 28 January 1997.
From 9 October 2007 until his retirement Bossuyt was the President of the Dutch linguistic group of the Constitutional Court of Belgium.
Bossuyt was a member of the UN Committee on the Elimination of Racial Discrimination (2000–2003, 2014–present).