| Guldursun-Kala | |
| Native Name: | Guldursun-Kala |
| Alternate Name: | Guldursun-Kala |
| Map Type: | West Asia#Uzbekistan |
| Relief: | yes |
| Coordinates: | 41.6931°N 60.9815°W |
| Type: | Settlement |
| Condition: | Ruined |
Guldursun-Kala, also Guldursun Qala, in modern Karakalpakstan, Uzbekistan, was an ancient fortress in Chorasmia built in the 12th century CE.[1] It is one of the largest fortresses of Khwarezm, with perimeter walls of about 1 kilometer in total length, and an internal area of about 6.4 hectares (64,000 square meters, or 15.8 acres).
It is part of the "Fifty fortresses oasis" in modern-day Uzbekistan.[2] It was last occupied by Muhammad II of Khwarazm (1169, 1200-20), before it fell to the Mongol conquest of the Khwarazmian Empire.