LuLu or LU may stand for:
- Lu, the Chinese family name represented by the characters 呂 or 吕 or 陸 or 陆. A family by that name was a prominent supporter of the Eastern Jin Dynasty after the Han Zhao attacked the Jin.
- Lu (ethnic group), an ethnic group in Vietnam
- Lu (music), a Tibetan style of folk music
- LU factorization of matrix
- Lucerne, canton of Switzerland
- lutetium (Lu), symbol for the chemical element
- Luxembourg (ISO country code)