Marble Mountain is a Canadian rural community located in Inverness County, Nova Scotia.
Situated on the southwest shore of Bras d'Or Lake on Cape Breton Island, Marble Mountain's defining feature is a large marble quarry located on a hill above the community, as well as its white sand and gravel beach below the lakeside cliffs. The colouring of the sand and gravel gives the water a tropical green appearance in certain light conditions.