Nagaon district of Assam is located in the flood plains of the river Brahmaputra. The physiographic features of Nagaon District makes it ideal home for the growth of different types of economic plants. But these plants are found to be decayed by the association of some macro fungi. Among these macro fungi, different Ganoderma species were found to be associated with the different timber yielding plants and palm species. Ganoderma with great diversity produce large fruitification of different size, shape and colour. During the investigation 7 seven Ganoderma species were collected from 10 different Revenue Circles of Nagaon district. This work revealed that there are great diversity of Ganoderma species in Nagaon district, Assam. Some Ganoderma species have medicinal properties.