Syunik is located between the Nakhchivan Autonomous Republic of Azerbaijan from the west, and districts of Lachin (except Lachin corridor under surveillance of Russian peacekeepers according to Russian-brokored armistice) , Qubadli and Zangilan of Azerbaijan from the east. It was bordered from east Kashatagh Province of Nagorno-Karabakh Republic between 1992 and 2020. The Vayots Dzor Province of Armenia forms its northern borders, while Aras River at the south separates Syunik from Iran. Syunik covers an area of 4,506 km² (1740 sq. mi.) (15% of total area of Armenia), making it the second-largest province in Armenia after Gegharkunik in terms of the total area.