Koshoy Korgon or Qoshoy Qorgon (Kyrgyz: Кошой Коргон [qoʃoj qorʁón]) is a ruined fortress of uncertain date located in At Bashy district, Kyrgyzstan. The structure, which consists of walls made of mud enclosing a large area and is identified as a korgon ("fortress", not to be confused with a kurgan), is immediately to the southeast of Kara-Suu village, and a little ways west of At Bashy village. It is named after Qoshoy baatyr, one of Manas's generals, who is thought to have been a catalyst for its construction.