The Duan (Chinese: 段; pinyin: Duàn) was a tribe of Xianbei ethnicity during the era of Sixteen Kingdoms in China. They were a powerful tribe in the Liaoxi region and played a key role during the fall of the Western Jin dynasty. Unlike the Xianbei tribes of the steppe, the Duan were unique in that they were established within the borders of China. They ruled over their dukedom of Liaoxi and later established the Duan Qi state, although neither were considered part of the Sixteen Kingdoms. The tribe was conquered by the Murong-led Former Yan in 338, but remained politically influential as maternal relatives of the Murong.