Chang Do-yong was a South Korean general, politician and professor who, as the Army Chief of Staff, played a decisive role in the May 16 coup and was the first chairman of the interim Supreme Council for National Reconstruction for a short time until his imprisonment.

The May 16 military coup d'état was a military coup d'état in South Korea in 1961, organized and carried out by Park Chung Hee and his allies who formed the Military Revolutionary Committee, nominally led by Army Chief of Staff Chang Do-yong after the latter's acquiescence on the day of the coup. The coup rendered powerless the democratically elected government of Prime Minister Chang Myon and President Yun Posun, and ended the Second Republic, installing a reformist military Supreme Council for National Reconstruction effectively led by Park, who took over as chairman after General Chang's arrest in July.