The crossword solution for the term 'State in Northeastern India' is Assam. Assam is a state located in the northeastern region of India, bordered by Bhutan, Arunachal Pradesh, Nagaland, Manipur, Mizoram, and Meghalaya. It is the largest among the eight states of the Northeast region and is known for its rich culture and biodiversity. Assam is also home to the world's largest river island, Majuli.