Ludhiana (ਲੁਧਿਆਣਾ | लुधियाना) 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 25 lacs. The population increases substantially during the crop harvesting season due to immigration of laborers from states like Uttar Pradesh, Bihar 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 centrally located on the National Highway 1 from Delhi to Amritsar, and is connected to the Indian capital city of New Delhi by road and frequent train service.
Ludhiana is the richest district in the Punjab state, and also includes the most expensive fertile land of all of India. Dozens of NRI residents come to the city to invest in condos, hotels, and stand for elections in major Ludhiana cities such as Kila Raipur, Talwandi Rai, Raikot, Jagraon, Samrala, and Khanna. Even though Ludhiana is home to many NRIs it did not boost the city economy because the city was always in high demand before people had gone aboard