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.