| population_demonym = Ludhianvi

| timezone1 = IST

| utc_offset1 = +5:30

| postal_code_type = PIN

| postal_code = Multiple 141001-141016

| area_code = 0161

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| registration_plate = PB-10, PB-91

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Ludhiana () is the most populous city in the Indian state of Punjab. The city has an estimated population of 1,618,879 2011 census and distributed over , making Ludhiana the most densely populated urban centre in the state. It is a major industrial center of Northern India, referred to as "India's Manchester" by the BBC. It is also known as the commercial capital of Punjab.

It stands on the old bank of Sutlej River, that is now to the south of its present course. The Union Ministry of Housing and Urban Affairs has placed Ludhiana on the 48th position among the top 100 smart cities, and the city has been ranked as one of the easiest cities in India for business according to the World Bank.

History

During the period of Tughlaq dynasty of Delhi Sultanate, a fort was built at modern day Ludhiana. It was captured by Raja Jasrat during his 1421–22 campaign in Punjab. Later, Ludhiana was founded in 1480 by members of the ruling Lodi dynasty of the Delhi Sultanate. The ruling sultan, Sikandar Lodi, dispatched two ruling chiefs, Yusuf Khan and Nihad Khan, to re-assert Lodi control. The two men camped at the site of present Ludhiana, which was then a village called Mir Hota. Yusuf Khan crossed the Sutlej and established Sultanpur, while Nihad Khan founded Ludhiana on the site of Mir Hota.

The name was originally Lodi-ana", meaning "Lodi town", which has since shifted from "Lodiana" to the present form of Ludhiana. The Lodi Fort, or "Purana Qila", is the only surviving structure in the city from this period; located in the neighbourhood of Fatehgarh, it was well-maintained under Ranjit Singh and the British after him, but then fell into disrepair. It was declared a state-protected monument in December 2013.

The Semi Centennial Celebration of the American Presbyterian Lodiana Mission was held in Ludhiana from 3–7 December 1884.

Ludhiana's Old City includes landmarks like the Lodhi Fort, Daresi Grounds, The Clock Tower, & Sood Family Haveli.

Geography

Ludhiana is located at . It has an average elevation of . Ludhiana City, to its residents, consists of the Old City and the New City. The new city primarily consists of the Civil Lines area which was historically known as the residential and official quarters of the colonial British encampment.

The Old Fort was at the banks of the Sutlej (and now houses the College of Textile Engineering). Legend has it that a tunnel connects it to the fort in Phillaur– although why this should be is debatable, as the Sutlej was the traditional dividing line between the principalities, often occupied by enemy forces (see History section).

The tree of largest natural extraction was the kikar, or Acacia Indica, but has been supplanted by the eucalyptus, transplanted from rural Australia in the late 1950s by the Chief Minister Partap Singh Kairon.

Climate

Ludhiana features a relatively dry monsoon-influenced humid subtropical climate (Cwa) under the Köppen climate classification, although bordering on a hot semi-arid climate (BSh), with three defined seasons; summer, monsoon and winter. Ludhiana on an average sees roughly of precipitation annually. The official weather station for the city is in the compound of the Civil Surgeon's Office to the west of Ludhiana. Weather records here date back to 1 August 1868.

Ludhiana has one of the worst air pollution problems in India since 2011, with particulate matter being over six times the World Health Organization recommended standard, making it the 13th most polluted city in the world. Industrial water pollution is also of significant concern in portions of Ludhiana, notably along the Budha Dariya.

<div class="center">

</div>Ludhiana has been ranked 31st best "National Clean Air City" (under Category 1 >10L Population cities) in India.

Demographics

As per the 2011 census, Ludhiana had a population of 1,618,879. The literacy rate was 86.50 per cent, and the population consisted of 950,123 males and 743,530 females.

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<!--PLEASE DON'T INSERT THE RELIGION FIGURES OF LUDHIANA DISTRICT HERE. THIS ARTICLE IS ON LUDHIANA CITY AND NOT LUDHIANA DISTRICT AND THE RELIGION FIGURES MUST ALSO BE FOR LUDHIANA CITY. THE CITY OF LUDHIANA IS HINDU MAJORITY IN CONTRAST TO ENTIRE LUDHIANA DISTRICT WHICH IS SIKH MAJORITY.-->

With around 66% adherents according to 2011 Indian Census, Hinduism is the predominant religion of Ludhiana, followed by Sikhism with 29% of the population. Islam is followed by 2.8% and Christianity by less than 1%.

Prior to India's partition, Ludhiana had a population of 111,639 with Muslims being the majority with 62.9%.

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|+ Religious groups in Ludhiana City (1868–2011)