Wang Tuan (王摶) (died July 12, 900), courtesy name Zhaoyi (昭逸), formally the Duke of Lu (魯公), was an official of the Chinese dynasty Tang Dynasty, serving as a chancellor from 895 to 900, during the reign of Emperor Zhaozong. In 900, his powerful colleague Cui Yin falsely accused him of associating with eunuchs, and Emperor Zhaozong forced him to commit suicide.
It is not known when Wang Tuan was born. He was born from a lineage that had two male-line ancestors who were chancellors earlier in history — his 10th generation ancestor Wang Fangqing, who served under the female sovereign Wu Zetian, and his great-grandfather Wang Yu, who served under Emperor Suzong. Both his grandfather Wang Ji (王及) and father Wang Hui (王鐬) also served honored positions in the imperial administration.
At some point, Wang Tuan passed the imperial examinations in the Jinshi (進士) class. He thereafter served on the staff of the former chancellor Wang Duo (who was not related to him, as Wang Tuan was from the "Langye Branch" of Wangs while Wang Duo was from the "Taiyuan Branch" of Wangs) in Wang Duo's role as the prefect of Hua Prefecture (滑州, in modern Anyang, Henan). Wang Tuan later served as the prefect of Su Prefecture (蘇州, in modern Suzhou, Jiangsu), and later the deputy minister of census (戶部侍郎, Hubu Shilang) as well as director of taxation (判戶部, Pan Hubu).
In 895, when Emperor Zhaozong commissioned the chancellor Cui Yin to be the military governor of Huguo Circuit (護國, headquartered in modern Yuncheng, Shanxi) in an (ultimately unsuccessful) attempt to take back control of Huguo for the imperial government, he made Wang Tuan Zhongshu Shilang (中書侍郎) — the deputy head of the legislative bureau of government (中書省, Zhongshu Sheng) — and a chancellor with the designation of Tong Zhongshu Menxia Pingzhangshi (同中書門下平章事) to replace Cui. While it was said that Wang was understanding and magnanimous, and that the people considered him an excellent chancellor, little is known about Wang's own actions as chancellor, other than that, when Emperor Zhaozong fled from the imperial capital Chang'an into the Qinling Mountains later in the year in fear of being taken hostage by the warlords Li Maozhen the military governor of Fengxiang Circuit (鳳翔, headquartered in modern Baoji, Shaanxi) and Wang Xingyu the military governor of Jingnan Circuit (靜難, headquartered in modern Xianyang, Shaanxi), Wang Tuan, along with other chancellors Cui Zhaowei and Xu Yanruo, accompanied the emperor.