Sir Richard Owen, FRS KCB (20 July 1804 – 18 December 1892) was an English biologist, comparative anatomist and paleontologist.

Owen is probably best remembered today for coining the word Dinosauria (meaning "Terrible Reptile" or "Fearfully Great Reptile") and for his outspoken opposition to Charles Darwin's theory of evolution by natural selection. He agreed with Darwin that evolution occurred, but thought it was more complex than outlined in Darwin's Origin. Owen's approach to evolution can be seen as having anticipated the issues that have gained greater attention with the recent emergence of evolutionary developmental biology. He was the driving force behind the establishment, in 1881, of the British Museum (Natural History) in London. Bill Bryson argues that, "by making the Natural History Museum an institution for everyone, Owen transformed our expectations of what museums are for".