Wu may refer to:

• Wu (region), a region in China, associated with:
  • Wu (linguistics), a subdivision of spoken Chinese spoken in the Wu region
  • State of Wu, a state in the Wu region during the Spring and Autumn Period
  • Kingdom of Wu, a state in southeastern China during the Three Kingdoms Period
  • Wu (Ten Kingdoms) , one of the kingdoms during the Five Dynasties and Ten Kingdoms Period
• wú (negative), Zhaozhou's response to the question: "Does a dog have the Buddha-nature?"
• Wu, a Chinese surname
• Wu style Taijiquan, also Wu/Hao style Taijiquan