| Honorific-Prefix: | The Hon. |
| Archibald Blake McCoig | |
| Office1: | Senator for Kent, Ontario |
| Appointed1: | William Lyon Mackenzie King |
| Term Start1: | 1922 |
| Term End1: | 1927 |
| Constituency Mp2: | Kent |
| Parliament2: | Canadian |
| Predecessor2: | District was created in 1914 |
| Successor2: | James Murdock |
| Term Start2: | 1917 |
| Term End2: | 1922 |
| Constituency Mp3: | Kent West |
| Parliament3: | Canadian |
| Predecessor3: | Herbert Sylvester Clements |
| Successor3: | District was abolished in 1917 |
| Term Start3: | 1908 |
| Term End3: | 1917 |
| Office4: | Member of the Legislative Assembly of Ontario for Kent West |
| Predecessor4: | Thomas Letson Pardo |
| Successor4: | George William Sulman |
| Term Start4: | 1905 |
| Term End4: | 1908 |
| Birth Date: | 8 April 1873 |
| Birth Place: | Tilbury East, Ontario |
| Party: | Liberal |
Archibald Blake McCoig (April 8, 1873 - November 21, 1927) was a Canadian politician.
Born in Tilbury East, Ontario, the son of Daniel McCoig, a Scottish immigrant, he was elected as a Liberal candidate to the Legislative Assembly of Ontario for the provincial riding of Kent West in the 1905 election. In 1908, he was elected to the House of Commons of Canada for the federal riding of Kent West. A Liberal, he was re-elected in 1911, 1917, and 1921. In 1922, he was called to the Senate of Canada representing the senatorial division of Kent, Ontario to allow James Murdock, the Minister of Labour, to take his seat. He served until his death in 1927.
McCoig married Adele M. Demarse in 1898. He served on the Chatham town council.