Wang Xun (王珣, 349–400) was a Chinese calligrapher of the Jin dynasty (265–420). Coming from the prominent Wang family, he was Wang Xizhi (王羲之)’s nephew, Wang Xianzhi (王献之)’s cousin.
Wang Xun’s most famous work is A letter to Boyuan, named as one of the Three Treasures of Calligraphy (三希) by the Qianlong Emperor.