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|Elevation||133 m (436 ft)|
|Time zone||IST (UTC+5:30)|
The foundation of this town was laid by Emperor Firoz Shah Tuglaq (1351-1388 AD) in 1370 AD, while he was on his way to the shrine of Saiyyad Salar at Baharaich. At that time, he settled in some Kayastha and Muslim families. Around 1400, a local Hindu (Pasi) strongman, Lohari Pasi, took possession of it and changed its name from Tuglaqpur to Laharpur. His descendants remained in possession of Laharpur for another 18 years or so. They were exterminated by a Muslim commander, Tahir Gazi of Kannauj in 1418 AD. The town became an important urban center when Raja Todarmal, the finance minister of Empror Akbar, reconstituted a new pargana of 765 villages with its administrative center at the town of Laharpur. Muslims ruled the town until the death of Mughal Emperor Aurangzeb in 1707, when, taking advantage of widespread anarchy across Mughal Empire, a local Gaur commander, Raja Chandar Sen invaded Sitapur in 1707. Since then it remained under the control local Gaur Kshatriyas until 1858 when it came under the rule of British Crown.
As of 2001[update] India census, the town is home to 50,080 souls. Males constitute 52% of the population and females 48%. It has an average literacy rate of 41%, lower than the national average of 59.5%. Male literacy is 47%, and female literacy is 34%. About 19% of the population in town is under 6 years of age.
The core business used to be weaving by local artisans mostly belonging to Muslim community but due to high cost of raw material and higher labor cost, this artisan based craft is on the verge of extinction. Laharpur used to be a hub of weaving and Zardozi work in past. However in present the main businesses in Laharpur are timber and leather work.
. Baba Jangli Nath temple of Lord Shiva, which used to be in the jungle, now inhabited, is situated 3 km from the main town.here, THE 'RAMLEELA' is very famous ,organised in month of sep -october every year.BHOLIYA BABA TEMPLE ,OMKARESHWAR TEMPLE,NAVEEN NAGAR SHIVALAYA and JAIN MANDIR are very grand places to visit, having wonderful histories too. It is famous for being the seat of Qalandaria Order of Sufism and the Dargah of Great Saints Hazrat Shah Alauddin Ahmad Chirminaposh Suharwardi, Hazrat Shah Abdul Rahman Jaanbaaz Qalandar and Hazrat Shah Maja Qalandar
- Benett, William (1878). A Gazetteer of the Province of Oudh. Allahabad (India): Government of Oudh.
- Falling Rain Genomics, Inc - Laharpur
- "Census of India 2001: Data from the 2001 Census, including cities, villages and towns (Provisional)". Census Commission of India. Archived from the original on 2004-06-16. Retrieved 2008-11-01.