Dwight Ireneus Douglass (1884–1940) was an American mining engineer and short story writer who was one of four founders of Phi Kappa Tau fraternity in 1906. Douglass was the son of a prominent Colfax, Illinois physician, David T. Douglass. He graduated from Colfax High School and attended college for two years at Ohio Wesleyan University, transferring to Miami University in 1904. He played football at Miami and became associated with a group of independent students who formed the Non-Fraternity Association which would evolve into Phi Kappa Tau.