Xiahou Shang (died May or June 226), courtesy name Boren, was a Chinese military general and politician of the state of Cao Wei during the Three Kingdoms period of China. He was a distant younger relative of Xiahou Yuan and a close friend of Cao Pi, the first emperor of the Cao Wei state.

Xiahou Shang was a distant younger relative of Xiahou Yuan and Xiahou Dun, generals who served under Cao Cao, the warlord who rose to power in the late Eastern Han dynasty and laid the foundation for the Cao Wei state in the Three Kingdoms period. As a youth, he was already known for being well-versed in planning and strategy. Cao Pi, one of Cao Cao's sons, highly regarded Xiahou Shang and treated him as a close friend.

In the 200s, when Cao Cao was at war with his rival Yuan Shao for control over northern China, Xiahou Shang served as a major (司馬) in Cao Cao's army and led cavalry forces into battle against Yuan Shao and his heirs. In 211, after Cao Pi was appointed General of the Household for All Purposes (五官中郎將) in the Han imperial court, Xiahou Shang served as a wenxue (文學; an officer of writings) under him. In 213, after Emperor Xian, the figurehead emperor of the Han Empire, enfeoffed Cao Cao as the Duke of Wei (魏公), Xiahou Shang was reassigned to be a Gentleman of the Yellow Gate (黃門侍郎) in Cao Cao's dukedom. In 216, Emperor Xian elevated Cao Cao from the status of a duke to a vassal king under the title "King of Wei" (魏王).

When the Wuchendi (無臣氐) branch of the Wuhuan tribes started a rebellion in Dai Commandery (代郡; around present-day Yu County, Hebei) and Shanggu Commandery (上谷郡; around present-day Beijing) in May 218, Cao Cao ordered his son Cao Zhang to lead forces to quell the revolt. During this time, Xiahou Shang served as an army adviser (參軍) under Cao Zhang and assisted him in defeating the Wuchendi.

In March 220, after Cao Cao died in Luoyang, Xiahou Shang received orders to lead the convoy escorting Cao Cao's coffin back to Ye (鄴; in present-day Handan, Hebei), the capital of the vassal Kingdom of Wei, for a proper funeral and burial. Cao Pi, as Cao Cao's heir apparent, succeeded his father as the King of Wei and Imperial Chancellor of the Han Empire. He first appointed Xiahou Shang as a Regular Mounted Attendant and later promoted him to Commandant of the Central Army (中領軍). As a reward for Xiahou Shang's contributions, Cao Pi also enfeoffed him as the Marquis of Pingling Village (平陵亭侯).

In late 220, Cao Pi usurped the throne from Emperor Xian, ended the Eastern Han dynasty, and established the Cao Wei state with himself as the new emperor. After his coronation, he elevated Xiahou Shang from a village marquis to a district marquis under the title "Marquis of Pingling District" (平陵鄉侯). Xiahou Shang was also appointed as General Who Attacks the South (征南將軍) and Inspector (刺史) of Jing Province, and put in charge of supervising military affairs in the southern frontiers of Wei.

During this time, Xiahou Shang proposed to Cao Pi to launch an attack on Shangyong Commandery (上庸郡; around present-day Zhushan County, Hubei), which was a territory of Cao Pi's rival Liu Bei. Cao Pi approved and ordered him and Xu Huang to lead troops to attack Shangyong Commandery. Xiahou Shang achieved success in his mission and pacified a total of three commanderies and nine counties. Cao Pi promoted him to Senior General Who Attacks the South (征南大將軍) in recognition of his achievements.

Sun Quan, another rival of Cao Pi, initially pledged allegiance to the Cao Wei state after Cao Pi became emperor in late 220. Cao Pi was so pleased that he awarded Sun Quan the title of a vassal king, "King of Wu" (吳王), and recognised Sun Quan's claim to the territories in the Jiangdong region and southern Jing Province. Xiahou Shang knew that Sun Quan was only pretending to submit to Wei rule so he urged Cao Pi to maintain his guard against Sun Quan. As Xiahou Shang foresaw, Sun Quan broke ties with Cao Pi in 222 and declared himself the emperor of an independent Eastern Wu (or simply Wu) regime.