Bengalis are the third-largest ethnic group in the world, after Han Chinese and Arabs. Thus, they are the largest ethnic group within Indo-Europeans. Apart from Bangladesh and the Indian states of West Bengal, Tripura, and Assam's Barak Valley, Bengali-majority populations also reside in India's union territory of Andaman and Nicobar Islands as well as Bangladesh's Chittagong Hill Tracts, with significant populations in Arunachal Pradesh, Delhi, Odisha, Chhattisgarh, Jharkhand, Meghalaya, Mizoram, Nagaland and Uttarakhand. The global Bengali diaspora (Bangladeshi diaspora and Indian Bengalis) have well-established communities in Pakistan, the United States, the United Kingdom, Canada, Australia, the Middle East, Japan, South Korea, Malaysia, Singapore, and Italy.