Kunwar Singh, also known as Babu Kunwar Singh was a chief organiser of the Indian Rebellion of 1857 from the Bhojpur region of Bihar. He was originally the ruler of Jagdishpur principality. He led a selected band of armed soldiers against the troops under the command of the British East India Company.

Jagdishpur is a nagar panchayat town of the district Bhojpur of the state of Bihar in eastern India. It was the capital of the eponymous Jagdishpur Raj ruled by Rajputs of the Ujjainiya clan. One of its rulers, Kunwar Singh, was a major figure in the Indian Rebellion of 1857, considered the leader of the rebellion in Bihar.