Gordon Benjamin Isnor (10 May 1885 - 17 March 1973) was a Canadian merchant and parliamentarian.
A Liberal, he was elected four consecutive times to the Canadian House of Commons as the Member of Parliament representing the Nova Scotia electoral district of Halifax. He was first elected in the Canadian federal election of 1935, and was re-elected in 1940, 1945, and 1949.
On 28 July 1955 he was appointed to the Canadian Senate on the recommendation of Louis St-Laurent, and represented the senatorial division of Halifax-Dartmouth until his death.
Outside of his political life, Isnor was a successful Halifax businessman and operated a chain of clothing stores bearing his name in Nova Scotia. A street in Dartmouth, Nova Scotia was named after him, as well a senior citizens home in Halifax, the Gordon B. Isnor Manor.