Ergun (Chinese: 额尔古纳市, É'ěrgǔnà Shì; Mongolian: Эргүн Ergün), formerly Ergun Right Banner (Mongolian: ᠡᠷᠬᠥᠨ᠎ᠠ ᠬᠣᠲᠠ Эргүнэ хот; Chinese: 额尔古纳右旗; pinyin: E'erguna You Qi), is a county-level city in China's autonomous region of Inner Mongolia. Administratively, Ergun is part of the prefecture-level city of Hulunbuir.