Lake Arin (in Turkish: Arin Gölü; also Sodalı Göl Armenian: Արին լիճը, Kurdish: Gola Arîn) is a soda lake in Adilcevaz district of Bitlis, Turkey. The lake is to the east of Adilcevaz and separated from Lake Van, the biggest lake of Turkey by alluvial deposits of only 1 kilometre (0.62 mi) width.

The mid point of the lake is  at 38°48′35″N 42°59′20″E / 38.80972°N 42.98889°E / 38.80972; 42.98889. The area of the lake is about 13 square kilometres (5.0 sq mi). Gadwall, red-crested pochard and ruddy duck are among the birds of the lake.