曲沃莊伯（？ - 前716年），姬姓，名鱔，一作鮮、鱓，春秋時期晉國曲沃的君主，曲沃桓叔之子，前731年繼位。

晉孝侯十六年（前724年）曲沃莊伯刺殺了晉孝侯，想要自立為晉君，但晉人把莊伯逐回曲沃，立晉鄂侯為國君。曲沃莊伯于晉鄂侯六年（前718年）再次出兵侵晉，但周天子發兵幹預，立晉哀侯，莊伯退回曲沃，於晉哀侯二年（前716年）去世。

Count Zhuang of Quwo or Earl Zhuang of Quwo (曲沃莊伯 Qūwò Zhuāng Bó), personal name Ji Shan, was a ruler of the Quwo (曲沃) state. He was the son of the founding ruler of Quwo, Huan Shu, and half-brother of Viscount Wu of Han, the first leader of the Han clan.

In 724 BC, Count Zhuang killed Marquis Xiao of Jin in the capital of Jin, Yi (翼). Then, Jin troops attacked Count Zhuang, forcing the latter to retreat to Quwo. Marquis E of Jin then ascended to the Jin throne.

According to the Records of the Grand Historian, when Count Zhuang heard the news of the death of Marquis E of Jin, he led troops to attack Jin. King Huan of Zhou ordered the Duke of Guo (虢公) to attack Count Zhuang, resulting in Count Zhuang's retreat to Quwo. The Jin people then supported Marquis E of Jin's son, Marquis Ai of Jin, to take the throne of Jin.

The Zuo Zhuan has a different record of the event. It says that Count Zhuang had an alliance with the Zheng and Xing (邢) states and they attacked the Jin capital, Yi. King Huan of Zhou sent troops to assist Count Zhuang. Marquis E of Jin fled to Sui (随). Soon afterwards, Count Zhuang betrayed King Huan of Zhou and attacked him. King Huan of Zhou then sent the Duke of Guo during the autumn of that year to attack Quwo and placed Marquis Ai of Jin on the Jin throne.

In 716 BC, Count Zhuang died and was succeeded by his son, Duke Wu.