Birganj (वीरगञ्ज) is a metropolitan city in Parsa District in Madhes Pradesh in southern Nepal. It lies south of the capital Kathmandu, attached in the north to Raxaul on the border of the Indian state of Bihar. As an entry point to Nepal from Patna, Birganj is known as the "Gateway of Nepal". It is also called the "Commercial Capital of Nepal". The town has significant economic importance for Nepal as most of the trade with India is via Birganj and the Indian town of Raxaul. The Tribhuvan Highway links Birgunj to Nepal's capital, Kathmandu.
Birganj was one of the first three municipalities formed during the rule of Prime Minister Mohan Shumsher Jang Bahadur Rana. It was declared a Metropolitan City on 22 May 2017 along with Biratnagar and Pokhara. Birganj is one of the largest cities in Nepal and the largest in Madhesh Province. Birganj is the fifth most populated metropolis of the nation.
Birgunj was established as a conglomerate of several villages in and around Gahawa Mai Temple. Gahawa Mai Temple remains the epicenter of the town. The settlement was named after Rana Prime Minister Bir Shamsher, thus acquiring the name Birgunj.
Before the establishment of Birgunj, the main center of Parsa district was Alau (near Dryport), Nepal. In July 1959 From Sugauli King Rajendra Bikram Shah has a history of setting up a military camp in Alau of Parsa district.
The ancient name of Birgunj was Gahawa but the 11th Rana Prime Minister of Nepal Bir Shamsher Jang Bahadur Rana changed it to Birgunj in 1897. Before the establishment of Birgunj Bazar, the surrounding villages of Bagahi, Alau, Barewa, Kalaiya, Parsauni, Inaruwa, and Chhapkaiya existed. To establish Birgunj Bazar in a forest covered area, Bir Shamsher Jang Bahadur Rana appointed his trusted duo Siddhvir Mathema and Dhadjavir Mathema (two brothers), respectively in Birgunj as the rulers of Mal Ada and Kath Mal Ada. In this connection, Siddhvir Mathema distributed free land and timber and provided cash assistance to the homeowners in Birgunj.