Yu Zhining (于志寧) (588 – 3 January 666[1]), courtesy name Zhongmi (仲謐), formally Duke Ding of Yan (燕定公), was a Chinese politician during the Tang dynasty, during the reigns of Emperor Taizong and Emperor Gaozong. He had served on the staff of Emperor Taizong's oldest son and crown prince Li Chengqian and, after Li Chengqian was removed for plotting to overthrow Emperor Taizong in 643, received approval for having tried to correct Li Chengqian in his ways. Emperor Taizong promoted him, and he subsequently played prominent roles in the imperial government late in Emperor Taizong's reign and early in Emperor Gaozong's reign. In 659, however, because he had previously not supported the ascension of Emperor Gaozong's second wife Empress Wu (later known as Wu Zetian), he was removed from his office based on accusations by her ally Xu Jingzong that he had conspired with Emperor Gaozong's uncle Zhangsun Wuji, who had opposed Empress Wu's ascension.
- ^ ([麟德二年十一月]庚寅，华州刺史、燕国公于志宁卒。) Jiu Tang Shu, vol.04. Yu Zhining's biography in Old Book of Tang recorded that he was 78 (by East Asian reckoning) when he died.