| William J. Gallant | |
| Office: | Member of the Legislative Assembly of New Brunswick |
| Term Start: | 1952 |
| Term End: | 1960 |
| Constituency: | Northumberland |
| Birth Date: | 31 March 1913 |
| Birth Place: | Rogersville, New Brunswick |
| Death Place: | Rogersville, New Brunswick |
| Spouse: | Lucie |
| Party: | New Brunswick Liberal Association |
| Occupation: | county councillor |
William J. Gallant (March 31, 1913 – January 30, 1964) was a Canadian politician. He served in the Legislative Assembly of New Brunswick from 1952 to 1960 as member of the Liberal party.[1]