King Yuan of Zhou, ch: 周哀王, pinyin: zhōu āi wáng, wg: King Ai of Chou, was the twenty-eighth sovereign of the Chinese Zhou Dynasty and the sixteenth of Eastern Zhou Dynasty.
| family name | Ji (姬 jī) in Chinese |
| given name | Quji (去疾 qù jí) in Chinese |
| era name | none |
| father | King Zhending of Zhou |
| mother | unknown |
| wife | unknown |
| children | unknown |
| duration of reign | 441 BC |
| tomb | unknown |
| temple name | unknown |
| courtesy name | unknown |
| posthumous name | 哀 (pinyin āi,) literary meaning: "lamentable" |
| Preceded by: King Zhending of Zhou |
Zhou Dynasty | Succeeded by: King Si of Zhou |