| William Addison Beynon | |
| Constituency Mp: | Moose Jaw |
| Parliament: | Canadian |
| Predecessor: | John Gordon Ross |
| Successor: | John Gordon Ross |
| Term Start: | 1930 |
| Term End: | 1935 |
| Birth Date: | 21 December 1877 |
| Birth Place: | King Township, Ontario, Canada |
| Death Place: | Winnipeg, Manitoba, Canada |
| Nationality: | Canadian |
| Party: | Conservative Party |
| Occupation: | barrister |
| Honorific Suffix: | KC |
William John Addison Beynon, KC (December 21, 1877 – June 8, 1968) was a Canadian politician and barrister. He was elected to the House of Commons of Canada in 1930 as a Member of the Conservative Party to represent the riding of Moose Jaw. He was defeated in the 1935 election. He died at his home in Winnipeg in 1968.[1]