|This article needs additional citations for verification. (July 2015) (Learn how and when to remove this template message)|
|Elevation||34 m (112 ft)|
|• Official||Maithili, Hindi, Urdu|
|Time zone||IST (UTC+5:30)|
|Lok Sabha constituency||Supaul|
|Vidhan Sabha constituency||Supaul, Pipra, Supaul, Tribeniganj, Chhatapur|
Supaul is located at  It has an average elevation of 34 metres (111 feet)..
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.
- Falling Rain Genomics, Inc - Supaul
- "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.