|Elevation||34 m (112 ft)|
|• Official||Maithili, Hindi|
|Time zone||IST (UTC+5:30)|
|Lok Sabha constituency||Supaul|
|Vidhan Sabha constituency||Supaul, [[Pipra, Supaul ],[Tribeniganj], [Chhatapur]]|
Supaul is a town and a municipality that is headquarters of Supaul district in the Indian state of Bihar. Not far from this place is the Indian border connecting Nepal. The Supaul Town is the administrative headquarters of this district.
River Kosi flows through Supaul. After the construction of Kosi Dam the flood situation has improved in Supaul. This year though (2008) the river Kosi changed its course and took the route it used to take 200 years ago. As a result major parts of Supaul districts were flooded. These were the worst floods since 1954.
Supaul is located at  It has an average elevation of 34 metres (111 feet). Rivers: Kosi.
Supaul,Thumaha, Bagahi, Triveniganj, Birpur, Nirmali, Kishanpur, Saraigadh-Bhaptiyahi, Pipra, Jagatpur, Garh-Baruari, Basantpur, Simrahi bazar, Raghopur, Karjain, Pratapganj, Shyamnagar, Chhatapur, Tamkulha,pilwaha, Jadiya(Sitaram Nagar), parsarma, Bihra - Patory, Motipur-Birdah, Simrahi Bazar, Laukaha Bazar, Rajpurhat, these places are also well known for business, one more interesting thing of Laukaha Bazar is Dussehra which is celebrated every year over here. Dharara (Ganpatganj) is holy place for "Shiv Lings".
Supaul has a rich history. The District of Supaul had been a part of Mithilanchal since the Vedic period. The area has been referred to as the fishery area (Matsya Kshetra) in the Hindu mythology. The two oldest democracies namely Angutaran and Apadnigam are known for their existence in the Buddhist era, which comprises today’s area of district Supaul.
The river Kosi which is considered as the sorrow of Bihar, flows through the district. Its major tributaries are Tilyuga Chhaimra, Kali, Tilawe, Bhenga, Mirchaiya, Sursar. The type of soil is sandy. Some where it is acetic and somewhere it is basic in nature. Supaul district in Bihar covers an area of 2,420 km2. Supaul district is part of the Koshi division. Supaul town is the administrative headquarters of the district. The district is bounded by Nepal in the north, Saharsa in the south, by Araria district in the east and on the west by Madhubani district. The East-West corridor(National Highway-57) is passing in Simrahi Bazar, Supaul, Raghopur. There are famous schools called Williams High School which is 112 years old. Apart from it there also few school who has become popular in these days. There is a public club which is more than 100 yrs old. Supaul is well connected to capital of state and country with rail and roads. Politically Supaul stands ahead with comparison to other district and it is a lok sabha constituency which produced eminent leaders like Lalit Narayan Mishra(Former Railway Minister),Satish Raj(Social Worker)and many more. Well - known 1974 batch IPS officer Late Randhir Prasad Verma belongs to this district town of the village Jagatpur.
Literacy in Supaul was very low, But currently it is rapidly increasing. A large number of reputed educational institute is running.One International school is also functioning as its initial stage. Many small schools, ITI is also running.Bihar Government is also planning for "Polytechnic College" in Karjain Bazar on PPP mode with Bivha International School Society.
As of 2011[update] India census, Supaul had population of 2,228,397 of which male and female were 1,157,815 and 1,070,582 respectively. The initial provisional data suggest a density of 919 in 2011 compared to 714 of 2001. Total area under Supaul district is of about 2,425 km2. With regards to Sex Ratio in Supaul, it stood at 925 per 1000 male compared to 2001 census figure of 920. The average national sex ratio in India is 940 as per latest reports of Census 2011 Directorate.
- Falling Rain Genomics, Inc - Supaul
- Kumod singh (12/05/2011). "International School Open". Official (simrahi). jagran. p. 5. Retrieved 16 August 2013.
- NA (NA). "college start up". bihar. Bihar. pp. NA. Retrieved 2013-05-20.
- "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.