William Carson McBrien | |
|---|---|
 McBrien c. 1917 | |
| Born | 12 January 1889 Orangeville, Ontario, Canada |
| Died | 18 June 1954 (aged 65) |
| Resting place | Prospect Cemetery |
| Citizenship | Canadian |
| Occupation | Businessman/Public Administrator |
| Years active | 1904—1954 |
| Organization | Toronto Transportation Commission |
| Known for | Modernizing the TTC and building Canada's first subway |
| Title | Chairman |
| Term | 1933—1954 |
| Political party | Conservative |
| Spouse | Clara Doreen Case |
| Relatives | Fred McBrien (brother) |
William Carson McBrien (12 January 1889 – 18 June 1954) was a Canadian business owner and civic administrator. He was a long-serving chairman of the Toronto Transportation Commission and oversaw the construction of Canada's first underground rapid transit subway system in Toronto, Ontario.