Shang Zhixin (Chinese: 尚之信; 1636 – 1680) was a warlord of the early Qing Dynasty, known for his role in the Revolt of the Three Feudatories. He was Prince of Pingnan (平南王, "Prince who Pacifies the South"), inheriting his position from his father Shang Kexi, who abandoned the Ming dynasty and surrendered to the Qing dynasty.
In 1673, Shang Kexi, on account of old age, requested the Kangxi Emperor to allow him to retire back in his adopted homeland Liaodong. He thus passed his position to Shang Zhixin, his eldest son. As Prince of Pingnan, he was in charge of the defence of Guangdong province.