Sir Isidore Salmon CBE DL JP (10 February 1876 – 16 September 1941) was a British businessman and Conservative Party politician.
He was the son of Barnett Salmon, cofounder (with Montague Gluckstein) of Salmon & Gluckstein tobacconists. The company later expanded into the catering business under the name of a third partner, Joseph Lyons. Isidore Salmon served his apprenticeship in the kitchens of the Hotel Bristol, London. He subsequently worked for Lyons and was in charge of catering at the Olympia Exhibition Centre and the Crystal Palace.
In 1907 he was elected to the London County Council as a Municipal Reform Party councillor. Initially he represented Islington West, then Hammersmith from 1910. He remained a member of the council until 1925, and served as vice-chairman in 1924-25.
As a member of the LCC, he promoted the teaching of catering skills, and was chairman of the Westminster Technical School for training chefs and waiters for thirty-one years. He was also the council's representative on the governing body of the National Training College of Domestic Subjects. He was appointed a Commander of the British Empire in 1920.