| Lord Zhuang of Cai 蔡莊侯 | |
| Succession: | Ruler of Cai |
| Reign: | 645–612 |
| Predecessor: | Lord Mu of Cai |
| Successor: | Lord Wen of Cai |
| Full Name: | Ancestral clan (姓) Jī (姬) |
| Posthumous Name: | Zhuang (莊) |
| Death Date: | 612 |
| Father: | Lord Mu of Cai |
| Issue: | Lord Wen of Cai |
Marquis Zhuang of Cai (蔡莊侯) (d. 612), born Jī Jiǎwǔ, was the fifteenth ruler of the State of Cai from to . He was the only known son of Lord Mu of Cai (蔡穆侯), his predecessor. His reign was a period of 34 years. He was succeeded by his son.