دریاچه ایونی

Also known as Yunin

Lake Ioni (), also known as Yonai (), (, Yunin) is a large freshwater lake in Chukotsky District, Chukotka Autonomous Okrug, Russia. It has an area of . Currently there are no permanent settlements on the shores of the lake, but there are remains of Stone Age dwellings. Reindeer herders occasionally visit the area, as well as fishermen. The nearest inhabited place is Lorino, located away.