Duan may refer to:

• Duan (surname), a Chinese surname
  • Duan dynasty, the ruling dynasty of the Dali Kingdom
• Duan tribe, pre-state tribe during the era of Sixteen Kingdoms in China
• Duan language, spoken on the Laotian–Vietnamese border
• Duan, mark of level in Chinese martial arts
• Lê Duẩn, the General Secretary of the Communist Party of Vietnam from 1959 until his death in 1986, and leader of Vietnam from 1969 to 1986
• Du'an Yao Autonomous County, in Guangxi, China
• Zaiyi, Prince Duan (1856-1922), Manchu prince and statesman during the late Qing dynasty
• Duan railway station, Paschim Medinipur district, West Bengal

This disambiguation page lists articles associated with the title Duan.
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