Nuri Demirağ (born 1886 in Divriği - died in 1957) was an early Turkish industrialist. He was one of the first millionaires of the Turkish Republic. His first innovation was the production of cigarette paper. Demirag then invested his capital in to the development of the Turkish railway network. Because of this investment, Mustafa Kemal Atatürk, give him the surname Demirağ, which translates as Iron Network.