|Elevation||66 m (217 ft)|
|• Official||Bhojpuri, Hindi|
|Time zone||IST (UTC+5:30)|
|Lok Sabha constituency||Gopalganj|
|Vidhan Sabha constituency||Gopalganj|
Gopalganj is a town, municipality and headquarters of Gopalganj district in the Indian state of Bihar. It was carved out of old Saran district (constited of now Chhapra, Siwan and Gopalganj) on October 2, 1973.
In the 18th century, it was ruled/governed by Hathwa Raj, which encompassed 1,365 villages. Under the British rule it was a part of Bengal province till the early 19th century.
In the 19th century with partition of Bengal in 1905. After partition it fell under the newly created Bengal which consisted of present-day Orissa and Bihar. It was part of saran district till 1973. On 2 October 1973, Saran District was partitioned to give birth to three districts Chappra, Siwan and Gopalganj.
Gopalganj covers 2,033 square Kilometers of area and ranks as the 26th largest district in the state of Bihar. In the western part, It has Gandak river flowing southwards. It is mostly plains and fertile land. It is located at  an average elevation of 66 meters (216 feet). It is situated in the North-west of Bihar State and is a border district, touching Indian state of Uttar Pradesh. Gopalganj is adjoined to the West Champaran district in the north, the place where Mahatma Gandhi started his revolution for independence, the Satyagrah Andolan, East Champaran district in east, Chhapra district in south-east, Siwan district in South, Deoria district( Uttar Pradesh) in West and Kushinagar district(Uttar Pradesh) in North-west. The district is adjacent to the famous Valmiki National Park. One of the great Hindu shrines, the goddess of thawe, is located in this district.
In general, Gopalganj is linked with humid subtropical climate zone but it doesn't experience snowfall and violent storms in winter(October to February). It experiences long summer from month of April till September with peak reaching in the month of June–July experiencing dust-storms,thunder-storms and dust raising winds, Winter from October till February with lowest in from Mid-December to Mid-January. It primarily receives rainfall in the month of June to September from approaching monsoon and then till November with retreating monsoon.
As of 2001[update] India census, Gopalganj had a population of 54,418. Males constitute 53% of the population and females 47%. Gopalganj has an average literacy rate of 63%, higher than the national average of 59.5%. The male literacy is 70% and female literacy is 55%.
It is one of the largest sugarcane producers in India. It also produces the best tobaccos in the country.
Gopalganj is the birthplace of three Chief Ministers of Bihar: the infamous politician and former Railway Minister of India Lalu Prasad Yadav, his wife Rabri Devi, and Abdul Ghafoor, the only Muslim chief minister of Bihar till date.
There is a famous place in Gopalganj named Vijaipur. It is situated on bank of the Burhi Gandak River. It is famous for thawe temple.
The Prachin Augadh Dani Mandir is in Mirganj, situated in front of post office.
- Falling Rain Genomics, Inc - Gopalganj
- "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.