| William Robertson | |
| Office1: | Ontario MPP |
| Term Start1: | 1943 |
| Term End1: | 1948 |
| Predecessor1: | George Henry Bethune |
| Successor1: | Joseph Lees Easton |
| Constituency1: | Wentworth |
| Party: | CCF |
| Birth Date: | 2 January 1897 |
| Birth Place: | Bothwellhaugh, Scotland |
| Death Place: | Toronto, Ontario |
| Occupation: | Labourer |
William Robertson (January 2, 1897 – April 15, 1948) was an Ontario labourer and political figure. He represented Wentworth in the Legislative Assembly of Ontario from 1943 to 1948 as a Co-operative Commonwealth member.
He was born in Bothwellhaugh, Scotland, the son of William Robertson, was educated there and came to Canada in 1926. He died when he was hit by a motorist right across the street from the Ontario legislative assembly in Toronto and buried in Hamilton Ontario.