Created by Pururava
Last edited May 2, 2026

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Kosi-Seemanchal

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Settlement type Subregion
Country India
State
District
Subdivision

Kosi-Seemanchal is in the Northeastern part of Bihar. It is a subregion within the larger cultural region of Mithila[1].It consists of Kosi and Purnia divisions.Template:Cn It has seven districts — Araria, Madhepura, Saharsa, Supaul, Purnea, Kishanganj and Katihar. Supaul, Saharsa and Madhepura in Kosi Region and Purnia, Katihar, Araria and Kishanganj in seemanchal region.[2]

Cities in Kosi–Seemanchal subregion with population over 1 lakh (Census 2011)
Rank City/Town District Population (2011) Remarks
1 Purnia (UA) Purnia 312,669 Urban Agglomeration
2 Katihar (UA) Katihar 240,838 Urban Agglomeration
3 Saharsa Saharsa 156,540 Municipality
4 Kishanganj Kishanganj 105,782 Nagar Parishad

Name

The name of the Kosi division comes from the Kosi River which flows through the region. On the other hand, Seemanchal (border area) is a colloquial alternate term for Purnia division owing to its close proximity with the Bangladesh–India border, although the state of Bihar itself does not share any international borders with Bangladesh. The term gained popularity after the veteran RJD leader Mohammed Taslimuddin first proposed the creation of a separate Seemanchal state in 1992, during a period when he was a Member of Parliament representing Purnia on a Janata Dal ticket. The proposal included the districts of Kishanganj, Purnia, Araria, Katihar, and sometimes Bhagalpur, and Khagaria. The demand was based on Seemanchal’s distinct demography (high Muslim population) and overall socioeconomic backwardness of the region.[3]

References