Sir Thomas Alexander Stewart, KCSI, KCIE (26 February 1888 – 11 May 1964) was a British administrator in India who served as Governor of Bihar. Educated at George Heriot's School, Edinburgh and Edinburgh University, Stewart entered the Indian Civil Service by examination in 1911. He successively served in the United Provinces, Burma, Madras, Bombay, and with the Government of India in Delhi. Steward was appointed CSI in 1935, knighted KCIE in 1937, and made a KCSI in 1939.