James Marnix de Booy (born de Booij; 24 July 1885, Kralingen – 1 March 1969, Lausanne) was a Dutch politician and member of the Dutch resistance.
De Booy was a liberal entrepreneur and government minister.
On 14 May 1940 he escaped to England (an Engelandvaarder) and in London, he was a member of the advisory board and extraordinary of shipping and commerce committee and appointed in 1944 as Minister of Marine and Fisheries.
For his war-time political activities in exile he was awarded the Medal of Freedom.
He was member of the "Raad der Vereniging" of De Nederlandsche Padvinders.