Ibrahim ibn Simjur (died 948) was a Samanid military officer from the Simjurid family.
In 945, the Samanid ruler Nuh I removed the governorship of Khorasan from Abu 'Ali, and instead gave it to Ibrahim.
However, Abu 'Ali responded by rebelling; he managed to capture the Samanid capital of Bukhara and place Nuh's uncle Ibrahim ibn Ahmad on the throne.
Abu 'Ali also forced Ibrahim and another Turkic military officer Mansur ibn Qara-Tegin to leave Nishapur.
Nuh eventually managed to quell the rebellion and Ibrahim shortly died himself in 948 and was succeeded by Mansur ibn Qara-Tegin as the governor of Khorasan.