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 House of Commons of Canada 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 Senate of Canada on the recommendation of Louis St-Laurent, and represented the senatorial division of Halifax-Dartmouth until his death.