Xiahou Ba (died c. 255–259), courtesy name Zhongquan, was a Chinese military general of the state of Cao Wei in the Three Kingdoms period of China. He was the second son of Xiahou Yuan, a prominent general who served under Cao Cao, the warlord who laid the foundation for the state of Cao Wei. Around 249, Xiahou Ba defected to Wei's rival state, Shu Han, after the regent Sima Yi seized power in a coup d'état. He died sometime between 255 and 259.