Ḥusām ad-Dīn ʿIwaz bin Ḥusayn Khaljī (Bengali: হুসামউদ্দীন ইওজ বিন হোসেন খলজী, Persian: حسام الدین عوض بن حسین خلجی), later known by his regnal title as Ghiyāth ad-Dīn ʿIwaz Shāh (Bengali: গিয়াসউদ্দীন ইওজ শাহ, Persian: غیاث الدین عوض شاه), was a two-time governor of Bengal under the Delhi Sultanate, and a member of the Khalji dynasty of Bengal.

[1][2] Khalji was also responsible for establishing Bengal's first naval force, the complete fortification of Lakhnauti (Gaur) and the founding of the fort-town of Basankot.

He transferred the capital from Devkot to Lakhnauti (Gaur), which he newly rebuilt and completely fortified in all four directions (with three lofty ramparts and making use of the river to the west of the city).

[15] In 1221, a khanqah was constructed by Ibn Muhammad of Maragheh for the Muslim preacher Makhdum Shah in Birbhum, during the governorship of Ali Sher.

He arranged for the arrival of Muslim preachers from Central Asia, such as Jalaluddin bin Jamaluddin Ghaznavi, to come to Bengal and give lectures in his court.

[19][4] After establishing peace in Bengal and developing the region, Iwaz Khalji turned his attention towards the expansion of his kingdom towards the south and the east.

With an uprising of Hindus in Awadh preoccupying the Delhi forces, Khalji left his capital to conduct an invasion of eastern Bengal in 1227.

Prince Nasiruddin Mahmud, who was leading the Delhi forces, made way for Bengal after swiftly suppressing the rebellion in Awadh.