Ay River (Russian: Ай) is a river in Bashkortostan and Chelyabinsk Oblast in Russia, a left tributary of the Ufa River. The length of the river is 549 km, the area of its drainage basin is 15,000 km². The Ay freezes up in late October - early November and remains icebound until mid-April. A city of Zlatoust is located on the Ay River.
This article includes content derived from the Great Soviet Encyclopedia, 1969–1978, which is in the public domain.