| King Si of Zhou 周思王 | |
| Succession: | King of the Zhou dynasty |
| Reign: | 441 BC |
| Predecessor: | King Ai of Zhou |
| Successor: | King Kao of Zhou |
| Full Name: | Ancestral name Jī (姬) |
| House: | Ji |
| Dynasty: | Zhou (Eastern Zhou) |
| Death Date: | 441 BC |
| Posthumous Name: | King Si (思王) |
| Father: | King Zhending of Zhou |
King Si of Zhou, personal name Ji Shuxi, was a king of the Chinese Zhou dynasty.[1]
He gained the throne in 441 BC by killing his older brother King Ai, but he was in turn killed by his younger brother King Kao after only five months of rule.[2]