| William Joseph Smith | |
| Birth Date: | 1910 |
| Birth Place: | Brigus, Newfoundland |
| Death Place: | Corner Brook, Newfoundland |
| Office1: | MHA for St. Barbe South |
| Term Start1: | 1962 |
| Term End1: | 1965 |
| Successor1: | Gerald Myrden |
| Party: | Progressive Conservative Party of Newfoundland and Labrador |
| Occupation: | Lawyer |
William Joseph Smith (1910 – August 4, 1965) was politician in Newfoundland. He represented St. Barbe South in the Newfoundland House of Assembly from 1962 to 1965.[1] He died of heart failure in office in 1965.[2]