Lake Urmia (, Daryache-ye Orumiye; , Urmiya gölü) is an endorheic salt lake in Iranian Azerbaijan, Iran and near Iran's border with Turkey. The lake is between the provinces of East Azerbaijan and West Azerbaijan in Iran, and west of the southern portion of the Caspian Sea. At its full size, it was the largest lake in the Middle East and the sixth largest saltwater lake on earth with a surface area of approximately 5,200 km² (2,000 mile²), length, width, and 16 m (52 ft) depth. The lake has shrunk to 10% of its former size due to damming of the rivers that flow into it and pumping of groundwater from the area.