Lu (Chinese: 魯; c. 1042 – 249 BC) was a vassal state during the Zhou dynasty of ancient China located around modern Shandong.

Founded in the 11th century BC, its rulers were from a cadet branch of the House of Ji (姬) that ruled the Zhou dynasty.

The state's capital was in Qufu and its territory mainly covered the central and southwest regions of what is now Shandong Province.

Although a Qi invasion was defeated in the Battle of Changshao in 684 BC, Lu would never regain the upper hand against its neighbour.

The Duke of Zhou's offspring held the title of Wujing Boshi (五经博士; 五經博士; Wǔjīng Bóshì).