Protected areas which are essential for biodiversity conservation often provide habitat and protection from other anthropogenic activities threatened to the pristine wildlife. Therefore, establishment of new protected areas like, sanctuaries, biosphere reserve and national parks relieve the wildlife a lot from risk. Before starting conservation and management of the protected areas, one need to know which species are endangered or threatened and what we must conserve. Raimona National Park was declared as the National Park by the Government of Assam on the World Environment Day, 2021. A visit of six days to this national park enumerates 62 species of insects. These includes 41 species of butterflies and 5 species of moths, 3 species of dragonflies, 7 species of grasshoppers and crickets, 3 species of bugs and 3 species of bees and wasps. Only 4 species of butterflies are found here under WPA ACT (1972). This paper presents the first insect inventory from the 6th national park of Assam and the last declared national parks in India.