Charles Alexander Magrath (April 22, 1860 – October 30, 1949) was a Canadian land surveyor and statesman.

He joined Sir Alexander Tilloch Galt and Elliott Torrance Galt in their western industrial enterprises as a surveyor, later becoming Elliott's assistant and Land Commissioner of the North Western Coal and Navigation Company.

Magrath was elected to the House of Commons representing the Medicine Hat constituency (1908–1911).

He was fuel controller during the Great War and chairman of Ontario Hydro and the Canadian section of the International Joint Commission.

However, during his lifetime he was quick to acknowledge the contributions of Charles Ora Card, the LDS Church, and Elliot Galt to the development of irrigation in the Lethbridge region.