Nasir ud din Mahmud was the eighth Sultan of the Mamluk Sultanate of Delhi (also known as the Slave dynasty). In 1246, he became the Sultan and ruled for nearly 20 years.
Ghiyasuddin Balban was his Prime minister as well as the actual ruler. After the death of Nasiruddin Mahmood in 1266 AD, Balban became the Sultan as Nasir-ud-din.