Kosi region

Koshi Region
Subregion
Kosi Region
Coordinates: 26°07′34″N 86°36′18″E / 26.126°N 86.605°E / 26.126; 86.605
Country India   Nepal
StateBihar
RegionMithila
Largest citiesSaharsa,Itahari,Dharan and The Supaul
Division and DistrictKosi Division And Sunsari District
DemonymMaithil
Language
 • LanguageMaithili and Thethi dialect

Kosi Region is a region in Bihar (India) and Nepal's Sunsari District. There are 4 districts in this region: Sunsari District, Saharsa District, Madhepura District and Supaul District. It consists of Kosi Division and Sunsari District.[1] It is a subregion in Mithila. Its geographically capital is Supaul.[2]

Rank Towns/

Cities

District population
1. Saharsa Saharsa 216,491
2. Dharan Sunsari 173,096
3. Itahari Sunsari 198,098
4. The Supaul Supaul 65,437

Name

The name of Kosi region comes from Kosi River/Kausiki that flows through this region. The name kosi came from Kausiki.[3]

Administration

Kosi Region have 4 districts:

History

Kosi Region has been a part of Mithila till ancient times. It was ruled by Videha in latter vedic period, Darbhanga Raj (Princily state) and many others.[5] The Rive Kosi that flows thourh this region was also known as kausiki in Hindu mythologies.[6]

References

  1. ^ "Kosi Division". KnowBihar. Retrieved 25 February 2026.
  2. ^ "Client Challenge". www.scribd.com. Retrieved 12 March 2026.
  3. ^ team, India Water Portal (22 December 2008). "Kosi River". India Water Portal. Retrieved 25 February 2026.
  4. ^ "Client Challenge". www.scribd.com. Retrieved 12 March 2026.
  5. ^ Thakur, Ripunjay Kumar (1 January 2021). "Historical Geography of Early Medieval Mithila: From Videha to Tirhut". Kanpur Philosophers, a UGC CARE listed and an Internationally Peer Reviewed Journal, Vol. VIII, Issue II.
  6. ^ "What is the ancient name of the river Kosi?". prepp.in. Retrieved 25 February 2026.