George Septimus Rennie CMG (23 July 1866 – 13 October 1930) was a Conservative member of the House of Commons of Canada. He was born in Hamilton, Canada West and became a coroner, physician and surgeon. Rennie attended schools at Hamilton then Toronto where he received his first medical degrees at Toronto's Trinity Medical College. He proceeded to further studies in London where he received the Royal College of Physicians licentiate (LRCP) diploma. He received his LRCS licence at Edinburgh. Rennie studied further at Paris and Vienna.