Theodore Edgar Dupue Hackney (June 10, 1888 – October 19, 1971) was an American football and basketball coach. He served as the head football coach at Texas Christian University (TCU) in Fort Worth, Texas in 1919, compiling a record of 1–7. Hackney was the school's head basketball coach during the 1919–20 season, tallying a mark of 1–7. A native of Springfield, Missouri, Hackney played football, basketball, and baseball, and the University of Missouri.