Charles James O'Cahan O'Donnell (1849 – 3 December 1934) was an Irish colonial administrator in the British Raj, and later a member of the Parliament of the United Kingdom. O'Donnell was born in Donegal in 1849. He was educated at Queens College Galway, and passed the Indian Civil Service Examinations in 1870. He served in Bengal and dealt with the famine of 1874. His duties also included tenant rights and judicial control of rents. He was the brother of Frank Hugh O'Donnell. He married Constance Langworth in 1882. O'Donnell died at Hans Crescent, London, in December 1934.