Kulthum ibn Iyad al-Qushayri (Arabic: كلثوم بن عياض القشيري) was an Umayyad governor of Ifriqiya for a few months, from February to his death in October 741.
He replaced the disgraced Ubayd Allah ibn al-Habhab, whose misgovernment had provoked the Great Berber Revolt in the area of modern Morocco and led to the defeat of the Arab army at the Battle of the Nobles in late 740.
Kulthum was given an Arab army of 30,000, raised from the regiments (junds) of the east, specifically, Damascus, Jordan, Qinnasrin, Hims, Palestine and Egypt.
Kulthum then hurried along the coast to make junction with the remaining Ifriqiyan forces of Habib ibn Abi Ubayda, then holding ground against the Berber rebellion around Tlemcen.
Disdaining the advice of the experienced Ifriqiyans, Kulthum made several tactical errors which led to the disastrous defeat of the Arab army at the Battle of Bagdoura in October 741.