Alexander Henry Green (October 10, 1832 - 1896), English geologist, son of the Rev. Thomas Sheldon Green, master of the Ashby Grammar School , was born at Maidstone.

He was educated partly at his father's school, Ashby-de-la-Zouch, and afterwards at Gonville and Caius College, Cambridge, where he graduated as sixth wrangler in 1855 and was elected a fellow of his college. In 1861 he joined the Geological Survey of Great Britain, and surveyed large areas of the midland counties, Derbyshire and Yorkshire.

He wrote (wholly or in part) memoirs on the Geology of Banbury (1864), of Stockport (1866), of North Derbyshire (1869, 2nd ed. 1887), and of the Yorkshire Coal-field (1878). In 1874 he retired from the Geological Survey, having been appointed professor of geology in the Yorkshire College at Leeds; in 1885 he became also professor of mathematics, while for many years he held the lectureship on geology at the school of military engineering at Chatham.

He was elected fellow of the Royal Society in 1886, and two years later was chosen professor of geology in the university of Oxford. His manual of Physical Geology (1876, 3rd ed. 1882) is an excellent book. He died at Boars Hill, Oxford, on the 19th of August 1896.

A portrait of him, with brief memoir, was published in Proc. Yorksh. Geol. and Polytechnic Soc. xiii. 232.