Mirza Shah Mahmud (born c. 1446) was briefly a Timurid ruler of Herat. He was the son of Abul-Qasim Babur Mirza, who was a great-grandson of Timur. Shah Mahmud succeeded his father upon his death in 1457 at the age of eleven. Only a few weeks later, his cousin Ibrahim Mirza, a son of Ala al-Dawla Mirza, expelled him from Herat. Shah Mahmud failed to distinguish himself in the following years, and died sometime in the 1460s.