The 9th Canadian Infantry Brigade was an infantry brigade of the Canadian Army that saw active service during World War I and World War II as part of the 3rd Canadian Infantry Division. The brigade fought on the Western Front during World War I from January 1916 to November 1918, and in Normandy and north-west Europe in 1944–1945 during World War II. It was a square formation of four infantry battalions during World War I, but was reduced to a triangular formation of three battalions during World War II.

The 3rd Canadian Division is a formation of the Canadian Army responsible for the command and mobilization of all army units in the provinces of Manitoba, Saskatchewan, Alberta and British Columbia, as well as all units extending westwards from the city of Thunder Bay.