The Rouran (Chinese: 柔然; pinyin: Róurán) ruled northern China during the Sixteen Kingdoms period.

They were either proto-Mongols or Turkic. They spoke the Ruanruan language, an Altaic or Sino–Tibetan language.

They descended from the Xianbei. The Rouran are the first to use the words "khan" or "khagan". The Rouran Khaganate existed between the 4-6 centuries. They were then overthrown by the Gokturks. This led to the rise of the Turkic peoples.

The Rouran may have fled west after that and become part of the Pannonian Avars. The Göktürks chased after these "Avars" into the Byzantine Empire.