Ludhiana is a city and a municipal corporation in Ludhiana district in the Indian state of Punjab, and India's largest city north of Delhi, with an area of 310sq. km and an estimated population of 1,618,879 as of the 2011 census. The population increases substantially during the harvesting season due to the migration of labourers from highly populated states like Uttar Pradesh, Bihar, West Bengal and Odisha. The city stands on the Sutlej River's old bank, 13 kilometres (8.1 mi) south of its present course. It is an industrial center of northern India; the BBC has called it India's Manchester. Ludhiana was among the list of smart city that will be developed by government of India.