Patrick Small Keir Newbigging FRSE FRSSA FRCSE (1813–1864) was a Scottish surgeon and general practitioner. He was President of the Royal Medical Society and of the Royal Scottish Society of Arts. Together with his father, Sir William Newbigging he formed one of the few father-son pairs of former Presidents of the Royal College of Surgeons of Edinburgh. His observations on the origin of the heart sounds and of the apex beat of the heart made a significant contribution to the debate.