Robert George Spencer Hudson (1895-11-17 – 1965-12-29) was an English Geologist and Paleontologist. He was born in Rugby, Warwickshire, the eldest son of Robert Spencer Hudson. He was educated at St Matthew's School and then Lawrence Sheriff School, where his interest in geology was started through a schoolmaster taking the students fossil hunting in the strata used for cement making. In 1958 he was awarded the Murchison Medal by the Geological Society of London for "his significant contribution to the science by means of a substantial body of research."