Cadomin is a hamlet in west-central Alberta, Canada, within Yellowhead County. It is along the McLeod River in the foothills of the Rocky Mountains, approximately 50 kilometres south of Hinton near the Bighorn Highway. It is served by a spur of the Canadian National Railway. Statistics Canada recognizes Cadomin as a designated place. It is in Census Division No. 14 and in the riding of Yellowhead. It is administered by Yellowhead County.