Kyzyl-Kala, also Qyzyl Qala ("Red fortress"), in modern Karakalpakstan, Uzbekistan, was an ancient fortress in Chorasmia built in the 1st-4th century AD.

[1][2] The small fortress of Kyzyl-Kala is located near Toprak-Kala, about 1 km to the west, and was also built in the 1st-4th century AD, possibly as a fortified defense for the site of Toprak-Kala.

It has also been the subject of a modern renovation program, with the objective of showing what a fortress looked like originally.

It is part of the "Fifty fortresses oasis" in modern-day Uzbekistan.

[3] It was last occupied by Muhammad II of Khwarazm (1169, 1200-20), ruler of the Khwarazmian Empire, before it fell to the Mongol conquest of Khwarazmia.