Liang Dunyan (; 1857, Foshan, Guangdong, Qing Empire – May 10, 1924, Tianjin, Republic of China) was a Qing dynasty diplomat and politician. A graduate of Yale University, he served as the minister of foreign affairs in the first cabinet of China under Yikuang (Prince Qing) and later in the cabinet of Yuan Shikai. A monarchist, he supported the Manchu Restoration of July 1917 and was the foreign minister under Zhang Xun.