| Honorific-Prefix: | The Hon. |
| Gordon Benjamin Isnor | |
| Office: | Member of the Nova Scotia House of Assembly |
| Term Start: | 1928 |
| Term End: | 1935 |
| Constituency Mp2: | Halifax |
| Parliament2: | Canadian |
| Predecessor2: | Felix Patrick Quinn William Anderson Black |
| Successor2: | Samuel Rosborough Balcom |
| Term Start2: | 1935 |
| Term End2: | 1950 |
| Alongside2: | Robert Emmett Finn (1935–1940) William Chisholm Macdonald (1940-1947) John Dickey (1947-1950) |
| Office3: | Senator for Halifax-Dartmouth, Nova Scotia |
| Term Start3: | 1950 |
| Term End3: | 1973 |
| Appointed3: | Louis St. Laurent |
| Birth Date: | 10 May 1885 |
| Birth Place: | Dartmouth, Nova Scotia |
| Party: | Liberal |
| Committees: | Chair, Special Committee on War Expenditures and Economies (1946) Chair, Standing Committee on Tourist Traffic (1955-1965) |
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.
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.[1]