Cao Mao, ch 曹髦, py. cáo máo, wg. Ts'ao-Mao (between 240 and 242-260) was an emperor of the Kingdom of Wei. He was a grandson of Cao Pi and the Gāogùixīang Gōng (高貴鄉公; "Duke of the Noble Town", Wade-Giles Kao-kuei-hsiang Kung), He was murdered in an abortive coup d'etat against Sima Zhao (司马昭).
| Family name | Cao (曹 py. cáo) in Chinese |
| Given name | Mao (髦 py. máo) |
| Era name | Zhengyuan (正元 zhèng yúan) 254-256 Ganlu (甘露 gān lù) 256-260 |
| Father | Cao Lin, King of Donghai |
| Mother | |
| Wife | empress Bian |
| Major concubines | |
| Children | |
| Duration of reign | 254 to 260 |
| Tomb | |
| Temple name | |
| Courtesy name | ch.彥士, py. yán shì, wg. yen-shih |
| posthumous name | |
| Preceded by: Cao Fang |
Kingdom of Wei | Succeeded by: Cao Huan |