Yang's parents are Yang Gwan-gwon and Ki Suk-hyang. Their impoverished family previously lived in one of Gwangju's shantytowns, before relocating to North Jeolla Province's Gochang, in South Korea's countryside, in 2010, after his father, a construction worker, suffered from serious injuries. His family currently lives in a makeshift converted greenhouse constructed from PVC pipes. After Yang's father lost his job, Yang supported the family with a modest income from the Korea Gymnastic Association. Yang's coach Cho Sung-doe admitted that he had been unaware of the family's precarious financial situation before Yang won the gold medal.