William Stewart (1769 – 8 April 1854) was a Scottish-born Australian administrator, politician and soldier. He was born in Caithness to William Stewart. In 1794 he enlisted in the army, serving in the West Indies, Spain, Portugal and Canada and in the occupation of France. In 1825 he was sent to New South Wales as Lieutenant-Governor, holding the post until 1827. Stewart married Sylvia Anne, née Wolfe, and was survived by three daughters and one son, James Horne Stewart. After his post ended he went to India, where he became a major general. He returned in 1831 and was granted land near Bathurst. Stewart died there in 1854.