West Bengal (/bɛnˈɡɔːl/) is an Indian state, located in Eastern India on the Bay of Bengal. With over 91 million inhabitants (as of 2011), it is India's fourth-most populous state. It has an area of 88,752 km2 (34,267 sq mi). A part of the ethno-linguistic Bengal region of the Indian subcontinent, it borders Bangladesh in the east, and Nepal and Bhutan in the north. It also borders the Indian states of Odisha, Jharkhand, Bihar, Sikkim, and Assam. The state capital is Kolkata (Calcutta), the seventh-largest city in India. As for geography, West Bengal includes the Darjeeling Himalayan hill region, the Ganges delta, the Rarh region, and the coastal Sundarbans. The main ethnic group are the Bengalis, with Bengali Hindus forming the demographic majority.
The area's early history featured a succession of Indian empires, internal squabbling, and a tussle between Hinduism and Buddhism for dominance. Ancient Bengal was the site of several major Janapadas (kingdoms), while the earliest cities date back to the Vedic period. The region was part of several ancient pan-Indian empires, including the Mauryans and Guptas. It was also a bastion of regional kingdoms. The citadel of Gauda served as the capital of the Gauda Kingdom, the Buddhist Pala Empire (eighth to 11th century) and Hindu Sena Empire (11th–12th century). From the 13th century onward, the region was ruled by several sultans, powerful Hindu states, and Baro-Bhuyan landlords, until the beginning of British rule in the 18th century. The British East India Company cemented their hold on the region following the Battle of Plassey in 175
t regions—the coastal plain, the hill ranges (the Western Ghats), the West Bengal Plateau to the east, and the black-soil tract to the northwest. The coastal plain represents a northward continuation of the Malabar Coast, with sand dunes giving place inland to small alluvial plains and lagoons. The coast itself is difficult to access, except by sea.