Ludhiana (also Ludhyana) is a city and a municipal corporation in Ludhiana district in the Indian state of Punjab. It is the largest city in Punjab, with an estimated population of 1398467 in 2010. The population increases substantially during the crop harvesting season due to immigration of laborers from states like Eastern Uttar Pradesh, Bihar, Orissa and Delhi. It has an area of about 310 km². The city stands on the Sutlej River's old bank, 13 km south of its present course. It is a major industrial center of northern India.
Ludhiana is located 100 km west from state capital Chandigarh on NH 95 and is centrally located on National Highway 1 from Indian capital New Delhi to Amritsar, and is well connected to New Delhi by road, frequent train service and by air.