Bhimnagar is on India's northern border with Sunsari District, Koshi Zone, Nepal with a border crossing to Setobandha village and the (east-west) Mahendra Highway, plus a customs checkpoint for goods.
Two new districts Madhepura & Supaul have been formed from Saharsa district on 30 April 1981 and 1991.
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.