Wang Dao (; 276 – 7 September 339), courtesy name Maohong (茂弘), formally Duke Wenxian of Shixing (始興文獻公), was a Chinese politician during the Jin dynasty who played an important role in the administrations of Emperor Yuan, Emperor Ming, and Emperor Cheng, including as Emperor Cheng's regent. In these capacities, he served as a crucial governing figure of the Eastern Jin Dynasty during its first decades, as well as the leading member of the prominent Wang clan of Langya. His governance style was to be lenient with the laws, and he handed out few punishments—which stabilized the Jin regime greatly, but which also led to extensive, if moderate, corruption and incompetence in the Jin regime, making it difficult for Jin armies to recapture northern China. Wang's line, during the subsequent Southern Dynasties, was known as one of the two most honored lines of nobles—the other being Xie An's line—and in the people's minds no less honored than imperial households. Early career Wang Dao's grandfather Wang Lan (王覽) and father Wang Cai (王裁) were mid-level Jin Dynasty officials, and he inherited from them the title Viscount of Jiqiu. He was the grandnephew of Wang Xiang. When he was young, during the late reign of Emperor Hui, he served on the staff of Sima Yue the Prince of Donghai. During that time, he befriended Sima Rui the Prince of Langye. It was at Wang's suggestion that Sima Rui slipped out of the capital Luoyang and stayed safe during most of the War of the Eight Princes in his Principality of Langye. When Sima Yue later became regent for Emperor Huai and commissioned Sima Rui to be the military commander for the area southeast of the Yangtze River, posted to Jianye (建業, modern Nanjing, Jiangsu), Wang volunteered to serve on Sima Rui's staff, and he became Sima Rui's chief advisor. As Sima Rui lacked fame, after he arrived in Jianye, few of the powerful local gentlemen would come visit and support him. Under Wang Dao's counsel, Sima Rui personally visited He Xun (賀循) and Gu Rong (顧榮) and invited them to serve in his administration. He and Gu were well regarded by the local population, which eventually began to trust Sima Rui's leadership. Wang Dao and his cousin, the general Wang Dun, served in key roles, and it was said at the time that the domain was ruled equally by the Simas and