The following outline is provided as an overview of and topical guide to West Bengal: West Bengal – state in eastern India and is the nation's fourth-most populous state, with over 91 million inhabitants. Spread over 34,267 sq mi (88,750 km2), it is bordered by the countries of Bangladesh, Nepal and Bhutan, and the Indian states of Odisha, Jharkhand, Bihar, Sikkim and Assam. The state capital is Kolkata (Calcutta), one of the largest cities in India. Together with the neighbouring nation of Bangladesh, it makes up the ethno-linguistic region of Bengal.