| J. William Smith | |
| Office: | Member of the Legislative Assembly of New Brunswick |
| Term Start: | 1925 |
| Term End: | 1935 |
| Constituency: | Kings |
| Birth Date: | 31 October 1868 |
| Birth Place: | Kingston, New Brunswick |
| Death Place: | Saint John, New Brunswick |
| Spouse: | Elizabeth |
| Party: | Conservative Party of New Brunswick |
| Occupation: | Contractor and builder |
| Children: | four |
| Residence: | Hampton, New Brunswick |
J. William Smith (October 31, 1868 – August 8, 1937) was a Canadian politician. He served in the Legislative Assembly of New Brunswick as member of the Conservative party representing Kings County from 1925 to 1935.[1]