King Ai of Zhou, ch.: 周哀王, pinyin: zhōu āi wáng, Wade-Giles: King Ai of Chou, was the twenty-eighth sovereign of the Chinese Zhou Dynasty and the sixteenth of Eastern Zhou Dynasty. He is the eldest son of the King Zhending Zhou.
| 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 |