Robert Plot (13 December 1640 – 30 April 1696) was an English naturalist, first Professor of Chemistry at the University of Oxford, and the first keeper of the Ashmolean Museum.
Born in Borden, Kent to parents Robert Plot and Elisabeth Patenden, and baptised on 13 December 1640, Plot was educated at the Wye Free School in Kent. He entered Magdalen Hall, Oxford in 1658 where he graduated with a BA in 1661 and a MA in 1664. Plot subsequently taught and served as dean and vice principal at Magdalen Hall while preparing for his BCL and DCL, which he received in 1671 before moving to University College in 1676.
By this time, Plot had already developed an interest in the systematic study of natural history and antiquities. In June 1674, with patronage from John Fell, the bishop of Oxford, and Ralph Bathhurst, vice-chancellor of the university, Plot began studying and collecting artefacts throughout the nearby countryside, publishing his findings three years later in The Natural History of Oxford-shire. In this work, he described and illustrated various rocks, minerals and fossils, including the first known illustration of a dinosaur bone which he attributed to a giant (later recognised as the femur of a Megalosaurus), but believed that most fossils were not remains of living organisms but rather crystallisations of mineral salts with a coincidental zoological form.