| William John Ward | |
| Parliament: | Canadian |
| Predecessor: | Robert Cruise |
| Successor: | James Langstaff Bowman |
| Term Start: | 1921 |
| Term End: | 1930 |
| Predecessor2: | James Langstaff Bowman |
| Successor2: | Fred Zaplitny |
| Term Start2: | 1935 |
| Term End2: | 1945 |
| Predecessor3: | Fred Zaplitny |
| Successor3: | Fred Zaplitny |
| Term Start3: | 1949 |
| Term End3: | 1953 |
| Birth Date: | 25 October 1880 |
| Birth Place: | near Owen Sound, Ontario |
| Death Place: | Dauphin, Manitoba |
| Party: | Progressive Party of Canada Liberal Progressive Liberal Independent Liberal |
William John Ward (October 25, 1880 – August 18, 1971) was a Canadian politician, farmer, insurance agent, and real estate agent from Dauphin, Manitoba. A member of the Ginger Group, he joined the Progressives in 1921, was a Liberal Progressive from 1926 to 1935, a Liberal from 1935 to 1957, and an Independent Liberal from 1957 to his death. He represented the Dauphin electoral district in the House of Commons of Canada from 1921 to 1930, 1935–1945, and 1949–1953.