Eugene William Oates (December 31, 1845 – November 16, 1911) was an English naturalist.
Oates was born in Sicily and educated in Bath, England. For a time he attended Sydney College, Bath and later under private tutors. He was a civil servant in the Public Works Department in India and Burma from 1867 to 1899. He retired to England, where he compiled a catalogue of the birds' eggs in the Natural History Museum, and served as secretary of the British Ornithologists' Union from 1898 to 1901.
- Oates, E.W. (1883). A handbook to the birds of British Burmah including those found in the adjoining state of Karennee. Vol II. R.H. Porter, London.
- Oates, E.W. (1899). A manual of the Game Birds of India. Vol. II, p. 139-146. Cambridge: Bombay.
- Oates, E.W. & Blanford, W.T. (1889–98). The Fauna of British India, Including Ceylon and Burma. (birds). 4 vols. Taylor & Francis, London.