Lu (, c. 1042–249 BC) was a vassal state during the Zhou dynasty of ancient China. 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 first duke was Boqin, a son of the Duke of Zhou, who was brother of King Wu of Zhou and regent to King Cheng of Zhou.

Lü was a Zhou dynasty vassal state in present-day central China in the early years of the Spring and Autumn period (722-481 BC).