The Koch dynasty ruled parts of eastern Indian subcontinent in present-day Assam and Bengal. Biswa Singha established power in the erstwhile Kamata Kingdom which had emerged from the decaying Kamarupa Kingdom. The dynasty came to power by removing the Baro-Bhuyans, who had earlier removed the short-lived rule established by Alauddin Hussain Shah.

Cooch Behar, also known as Koch Bihar, was a princely state in India during the British Raj. The state was placed under the Bengal States Agency, part of the Eastern States Agency of the Bengal Presidency. It is located south of the Himalayan kingdom of Bhutan, in present-day West Bengal.