Cao Lin (died 11 March 256) was a prince of the state of Cao Wei in the Three Kingdoms period of China. He was a son of Cao Cao, a warlord who rose to prominence towards the end of the Han dynasty and laid the foundation for the Cao Wei state. His mother was Lady Du (杜夫人), a concubine of Cao Cao. She also bore Cao Cao another son, Cao Gun. In 211, Emperor Xian, the last emperor of the Han dynasty, enfeoffed Cao Lin as the Marquis of Raoyang (饒陽侯). In 217, Cao Lin's title was changed to "Marquis of Qiao" (譙侯). In 221, a year after Cao Lin's half-brother Cao Pi usurped the throne from Emperor Xian and became the first emperor of the Cao Wei state, he enfeoffed Cao Lin as the Duke of Qiao (譙公). One year later, Cao Pi elevated Cao Lin from a duke to a prince under the title "Prince of Qiao" (譙