Chu or CHU may refer to:

• Chu (state) (c. 1030 BC–223 BC), a state during the Zhou dynasty
• Western Chu (206 BC–202 BC), a state founded and ruled by Xiang Yu
• Chu Kingdom (Han dynasty) (201 BC–70 AD), a kingdom of the Han dynasty
• Huan Chu (403–404), a state founded by Huan Xuan during the Eastern Jin dynasty
• Ma Chu (907–951), a kingdom during the Five Dynasties and Ten Kingdoms period
• Da Chu (1127), a puppet state installed by the Jurchen-led Jin dynasty during the Jin–Song wars

• Chu (Chinese surname)
• Zhu (surname) or Chu
• Chu (Korean name)
• Joo (Korean name) or Chu

• Hubei or Chu, a province of China
• Hunan or Chu, a province of China
• Chũ, a town and district capital in Bac Giang Province, Vietnam

• Chu River (Tributary of Wei River), a river of Ningxiang County, Hunan Province, China
• Chu River (Anhui), a river in Anhui and Jiangsu provinces, in China
• Chu (river), a river in Kyrgyzstan and Kazakhstan
• Nam Sam River or Chu River, a river in eastern Laos and the North Central Coast region of Vietnam
• Lục Nam River or Chũ River, a river in the Northeast region of Vietnam

• Houston County Airport (Minnesota)'s IATA code
• CHU (radio station), time signal, Ottawa, Canada
• Chung Hua University, Hsinchu, Taiwan
• Centre Hospitalier et Universitaire de Yaoundé (University Teaching Hospital of Yaounde), Cameroon
• CHU UCLouvain Namur, a university hospital, Namur, Belgium

• "Chu" (song), a song by f(x)
• Zhu (percussion instrument) or Chu, an ancient Chinese instrument

• Christelijk-Historische Unie or Christian-Historical Union, a former Protestant political party in the Netherlands
• Containerized housing unit, a shipping container converted to living space
• China Unicom's NYSE stock symbol CHU
• Old Church Slavonic's ISO 639 alpha-3 code
• Chu (Daoism), religious practices named chú (廚, "kitchen")
• Centigrade Heat Unit, an obsolete measure of heat

• Choo (disambiguation)
• Chuu (disambiguation)
• "Mr. Chu" (A Pink song)
• Shu, Kazakhstan (disambiguation)