Duke Gong of Cao (? – 618 BCE) (曹共公 Cáo Gòng Gōng) was the seventeenth ruler of the vassal State of Cao during the Chinese Spring and Autumn period (770 – 475 BCE). Born Ji Xiang (姬襄), he was the son of Duke Zhao of Cao.

In 637 BCE, during the exile of Chong』er, son of Duke Xian of Jin, Duke Gong heard that Chong』er suffered from fused ribs and wanted to see for himself. Chong』er caught Duke Gong spying on him whilst he bathed and described the Duke as a man of 「unbelievable rudeness」.

After Chong』er became Duke Wen of Jin and one of the Five Hegemons, in 632 he used Duke Gòng's previous rudeness as an excuse to overthrow the State of Cao. Duke Gòng was captured by the State of Jin but later released.

After Duke Gong of Cao died in 618 BCE, his son Duke Wen of Cao became ruler.

曹共公（？－前618年），姬姓，名襄，春秋時曹國第17位國君，曹昭公之子，前653年至前618年在位。

根據《左傳》《晉公子重耳之亡》中記載：當晉國公子重耳于前637年流亡曹國的時候，「曹共公聞其駢脅，欲觀其裸。浴，薄而觀之。」可看出曹共公是一位荒唐無禮之人。

後重耳即位為晉文公，為春秋五霸之一，以此為藉口于前632年伐曹，俘虜曹共公，後釋之。

前618年曹共公逝世，傳位于子曹文公。