[1] Sonpur division was established on 21 Oct. 1978 in North Eastern Railway zone.

Garhara yard and Dinkar Gram Simaria station were merged into this division on 1 January 2005.

[clarification needed] This division traverses through 8 districts of Bihar: Saran, Vaishali, Muzaffarpur, Samastipur, Begusarai, Khagaria, Bhagalpur and Katihar.

[2][3] Sonpur railway division area starts from Goldinganj (GJH) in the west in Saran.

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