The Surmalu uezd was a county (uezd) of the Erivan Governorate of the Caucasus Viceroyalty of the Russian Empire. It bordered the governorate's Etchmiadzin and Erivan uezds to the north, the Kars Oblast to the west, Persia to the east, and the Ottoman Empire to the south. The district made up most of the Iğdır Province of present-day Turkey. As part of the Russian Transcaucasus, the Surmalu uezd possessed economical importance for its abundantly rich salt mines in Kulp (Tuzluca), and spiritual importance to Armenians as the location of the culturally significant Mount Ararat. The administrative center of the uezd was the town Igdyr (present-day Iğdır).