Dí Rénjié (Chinese: 狄仁杰; pinyin: Dí Rénjié) (630 – August 15, 700), courtesy name Huaiying (怀英), formally Duke Wenhui of Liang (梁文惠公), was an official of the Chinese Tang Dynasty and Wu Zetian's Zhou Dynasty, twice serving as chancellor during her reign. He was one of the most celebrated officials of Wu Zetian's reign and was credited with moderating her reign from being considered one of terror to one of greater efficiency and honesty.

Di Renjie was born in 630, during the reign of Emperor Taizong. His family, from Taiyuan, was one that had produced many officials. His grandfather Di Xiaoxu (狄孝绪) served as Shangshu Zuo Cheng (尚书左丞), a secretary general of the executive bureau of government (尚书省, Shangshu Sheng), and his father Di Zhixun (狄知逊) served as the prefect of Kui Prefecture (夔州, modern eastern Chongqing). Di Renjie was known for studiousness in his youth, and after passing the imperial examination served as a secretary at the prefectural government of Bian Prefecture (汴州, roughly modern Kaifeng, Henan). While serving there, he was falsely accused of improprieties by colleagues, and when the minister of public works, Yan Liben, was touring the Henan Circuit (河南道, the region immediately south of the Yellow River), which Bian Prefecture belonged to, he was asked to judge the case. After seeing Di, he was impressed by him, and commented, "Confucius had said, 'You can tell a man's kindness by his failure.' You are a pearl from the coast and a lost treasure of the southeast." He recommended Di to become a bailiff for the commandant at Bing Prefecture (并州, roughly modern Taiyuan, Shanxi). While at Bing Prefecture, he was said to be caring of others. On one occasion, his colleague Zheng Chongzhi (郑崇志) was ordered to go on an official trip to a place far away. Di, noting that Zheng's mother was old and ill, went to the secretary general Lin Renji (蔺仁基) and offered to go in Zheng's stead. It was said that Lin was so touched by the concern that Di showed Zheng as a colleague that he relayed the episode to the military advisor to the prefect, Li Xiaolian (李孝廉), with whom Lin had a running dispute, and offered peaceful relations to Li.

By 676, during the reign of Emperor Taizong's son Emperor Gaozong, Di was serving as the secretary general at the supreme court (大理丞), and it was said that he was an efficient and fair judge, judging some 17,000 cases within a year without anyone complaining about the results. In 676, there was an event in which the general Quan Shancai (权善才) and the military officer Fan Huaiyi (范怀义) accidentally cut cypresses on Emperor Taizong's tomb—an offense punishable by removal from office, but Emperor Gaozong ordered that the two be executed. Di pointed out that, by law, the two should not be executed. This initially offended Emperor Gaozong, who ordered Di to leave his presence. Di continued to object, and eventually, Emperor Gaozong relented and exiled them. Several days later, he appointed Di to the imperial censorate.

Around 679, the minister of agriculture Wei Hongji (韦弘机) built three magnificent palaces around the eastern capital Luoyang -- Suyu Palace (宿羽宫), Gaoshan Palace (高山宫), and Shangyang Palace (上阳宫). Di submitted an accusation against Wei, arguing that he was leading Emperor Gaozong into being wasteful, and Wei was removed from his office. Meanwhile, around the same time, the official Wang Benli was said to be favored by Emperor Gaozong and, on account of that favor, was committing many illegal deeds and intimidating other officials. Di accused Wang of crimes; initially, Emperor Gaozong was set to pardon him. At Di's insistence—pointing out that the empire did not lack people with Wang's talent—Emperor Gaozong relented and allowed Wang to be punished.