Eastern South Asia

Eastern South Asia
Area	1,014,872 km2 (391,842 sq mi) (29th)
Population	565,662,147 (2022; 3rd)
Population density	557/km2 (1,444/sq mi)
HDI	0.641 (medium)
Demonym	South Asia
Countries	Bangladesh  Bhutan    Nepal
Languages	Most common first languages: Bengali Nepali
Time zones	UTC+5:30; UTC+5:45; UTC+06:00
Internet TLD	.in, .bd, .np, .bt
Calling code	Zone 8 & 9
Largest city	Largest urban areas: Dhaka Chittagong
Religions	Hinduism, Islam, Christianity, Buddhism, Irreligion, Tribal, Jainism, Sikhism, Judaism Zoroastrianism
Ethnic groups	Aryan, Tibeto-Burman, Kolarian, Khasi

Eastern South Asia^[1][2][3] is a geographical area in the Southern Asian subregion, precisely the eastern region of the subcontinent. It includes the countries of Bangladesh, Bhutan, Nepal and India (specifically East India and Northeast India). Geographically, it lies between the Eastern Himalayas and the Bay of Bengal. Two of the world's largest rivers, the Ganges and the Brahmaputra, flow into the sea through the Bengal region. The region includes the world's highest mountainous terrain and the world's largest delta, and has a climate ranging from alpine and subalpine to subtropical and tropical. Since Nepal, Bhutan, and northeast India are landlocked, the coastlines of Bangladesh and East India serve as the principal gateways to the region.

With more than 441 million inhabitants, Eastern South Asia is home to 6% of the world's population and 25% of South Asia's population. The Bangladesh, Bhutan, India, Nepal Initiative promotes economic integration in the region. The four countries are members of the South Asian Association for Regional Cooperation and the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation. Yunnan Province and the Tibet Autonomous Region of the People's Republic of China (PRC) and Myanmar are historically, economically, and culturally interdependent on Eastern South Asia. The Bangladesh–China–India–Myanmar Forum has established an economic corridor in the region.