Ban Yong (Chinese: 班勇; Wade–Giles: Pan Yung, died c. 128 CE), courtesy name Yiliao (宜僚), was the youngest son of the famous Chinese General, Ban Chao, and the nephew of the illustrious historian, Ban Gu who compiled the Book of Han, the dynastic history of the Former Han dynasty.
In 100 CE, his father, Ban Chao, wrote a request to the Emperor saying, amongst other things: "I have taken care to send my son (Ban) Yong to enter the frontier following porters with presents, and thus, I will arrange things so that (Ban) Yong sees the Middle Territories [usually referred to as the Western Regions - mainly the kingdoms in and around the Tarim Basin] with his own eyes while I am still alive." See the Book of the Later Han, Chapter 77 (sometimes given as Chapter 47), translated and adapted by E. Édouard Chavannes.
In 107 CE, the Western Regions in modern Xinjiang province rebelled against Chinese rule. Ban Yong was appointed as a Major (Jun Sima 軍司馬) and, with his elder brother, Ban Xiong (班雄), went via Dunhuang to meet up with the Protector General of the Western Regions, Ren Shang (?-119 CE), who had replaced Ban Chao as Protector General in 102 CE. The Chinese had to retreat and, following this, there were no Chinese functionaries in the Western Regions for more than ten years.
In 123 CE the Emperor gave Ban Yong the title of 'Senior Clerk of the Western Regions' so that he could lead five hundred freed convicts west to garrison Liuzhong (= Lukchun, in the southern Turpan Basin). After that, Ban Yong conquered and pacified Turpan and Jimasa (in modern Jimsar County).