John Archibald Maharg (February 2, 1872 – November 23, 1944) was a Saskatchewan politician. Born in Orangeville, Ontario, Maharg moved west and settled near Moose Jaw in 1890 where he became a grain farmer and cattle breeder. He helped organize the Saskatchewan Grain Growers Association becoming its first president from 1910 to 1923. The SGGA obtained loans from the government to build grain elevators and formed the Saskatchewan Co-operative Elevator Company with Maharg as founding president. He also served as president of the from 1915 to 1917.