Nana Sahib (born c. 1820—died c. 1859?, Nepal?) was a prominent leader in the Indian Mutiny of 1857–58. Although he did not plan the outbreak, he assumed leadership of the sepoys (British-employed Indian soldiers).
Adopted in 1827 by Baji Rao II, the last Maratha peshwa (ruler), Nana Sahib was educated as a Hindu nobleman. On the death of the exiled Baji Rao in 1852, he inherited the peshwa’s home in Bithur (now in Uttar Pradesh state). Although Nana Sahib’s adoptive father had pleaded that his £80,000-a-year life pension be extended to Nana Sahib, the British governor-general of India, Lord Dalhousie, refused. Nana Sahib sent an agent, Azimullah Khan, to London to push his claims, but without success. On his return Azimullah told Nana Sahib he was unimpressed by the supposed British military strength in the Crimean War.
That report, the refusal of his claim, and threats of the sepoys led him to join the sepoy battalions at Kanpur in rebellion in June 1857. He had sent Sir Hugh Wheeler, commander of British forces at Kanpur, a letter warning of the attack—a sardonic gesture to his former friends. A safe conduct given to the British under General Wheeler by Nana Sahib was broken on June 27, and British women and children were massacred at Nana Sahib’s palace. Lacking military knowledge, he could not command the mutinous sepoys, though he had the satisfaction of being declared peshwa in July 1857 by the rebel leader Tantia Tope and his followers after the capture of Gwalior. Defeated by General Henry Havelock and in December 1857 by Sir Colin Campbell (later Baron Clyde), he appointed a nephew, Rao Sahib, to give orders to Tantia. In 1859 Nana Sahib was driven into the Nepal hills, where he is thought to have died.