Princess Yuan of Lu (died 187 BC), also called Princess Luyuan, personal name unknown, was a princess of the Han Dynasty. She was the eldest daughter of the dynasty's founder Emperor Gaozu and Empress Lü Zhi. She was an older sister of the Han Dynasty's second ruler, Emperor Hui. She married Zhang Ao (張敖), son of Zhang Er (張耳), the king of the vassal state of Zhao. She had a daughter and a son with Zhang Ao: the former was Empress Zhang Yan, who married Emperor Hui; the latter was Zhang Yan (張偃), later became the Prince of Lu.