Saray-Jük (Turki/Kypchak and Persian: سرایجوق, Sarāyjūq; Kazakh: Кіші Сарай, Kişi Saray; Tatar: Сарайчык, Sarayçıq), was a medieval city on the border between Europe and Asia.

The city lay on an important trade route between Europe and China and flourished between the 10th and 16th centuries.

While in the town Ibn Battuta sold his horses and purchased camels to draw his wagons on the next stage of his journey to Konye-Urgench.

After the disintegration of the Golden Horde in the 14th century the city fell into decay: in 1395 it was ruined by Timur, but it was rebuilt in the 1430s-1440s.

The remains of buildings, workshops and others are situated at the bank of Ural River, which is washing away the ruins.