The Vilayet of Erzurum (Armenian: Էրզրումի նահանգ, Ottoman Turkish: ولايت ارضروم, Vilâyet-i Erzurum) was a first-level administrative division (vilayet) of the Ottoman Empire.
The vilayet of Erzurum shared borders with the Persian and Russian empires in the east and north-east, in the north with the Trebizond Vilayet, in the west with the vilayet of Sivas, and in the south with the vilayets of Bitlis, Mamuret-ül Aziz and Van.