Sun Deng (209 – 241), style name Zigao, is a crown prince of Eastern Wu during the Three Kingdoms period of Chinese history.

He is the oldest son of Sun Quan, founding emperor of Eastern Wu.

It is known that Sun Deng is both wise and virtuous, having all the makings of a great man.

Sun Deng is destined, however, never to become the emperor of Wu: he dies at a young age from illness.

Sun Deng had married Zhou Yu's daughter; they have three children, Sun Fan, Sun Ying, and Sun Xi.