Purnima Banerjee (née Ganguly, 1911-1951) was an Indian freedom fighter.Secretary of the Indian National Congress committee in Allahabad, she took part in the Salt March and the Quit India Movement and was subsequently imprisoned. Later, she became a member of the Uttar Pradesh Legislative Assembly and of the Constituent Assembly of India.She was Aruna Asaf Ali's younger sister. Suffering from ill-health, she died prematurely in Nainital a few years after the independence.