Edmund Leslie Newcombe, CMG (February 17, 1859 – December 9, 1931) was a Canadian lawyer, civil servant, and Puisne Justice of the Supreme Court of Canada.

Born in Cornwallis, Nova Scotia, the son of John Cumming Newcombe and Abigail H. Calkin, he received a Bachelor of Arts degree in 1878 and a Master of Arts degree in 1881 from Dalhousie University.

He received a Bachelor of Laws degree in 1881 from the short-lived University of Halifax.

In 1893, he became Deputy Minister of Justice and was called to the Ontario Bar, and was appointed Queen's Counsel shortly after.

As Deputy Minister, he "was responsible for all the legal work of the government of Canada".