Stjepan Šiber (born 20 June 1938, Gradačac) was a war time general of the Army of the Republic of Bosnia and Herzegovina. After finishing high school in Gradacac, he went to Ljubljana where he finished schooling at the military academy. Afterward, he became an officer in the Yugoslav People's Army. By 1992, he had become a Lieutenant Colonel in the JNA. In 2000, he was elected to the House of Representatives of Bosnia and Herzegovina.
In April 1992, he was accepted into a seat in the Presidency of Bosnia, where he would replace the commanding general of the army. Then, in 1993, he was promoted to Brigadier General and obtained a seat in the embassy of Bosnia in Switzerland.
He is a member of the Republicans Party BIH, together with Stjepan Kljuić, a fellow war member of the Presidency of Bosnia and Herzegovina.