Yana Bay – a vast Laptev Sea bay located between Cape Buor-Khaya on its western side and the Ebelyakh Bay at its eastern end, the Republic of Sakha (Yakutia), Russia. The south shore of the bay is formed by the coastal part of the Yana River delta. The width of the bay is 176 km. The bay is named after the Yana River which empties into it. There are several islands in the Yana Bay. The largest of them is Yarok Island. Other islands in the Yana Bay are the island of Makar and the Shelonsky Islands. East of these islands lies a deep inlet known in Russian as Shellyakhskaya Guba. Besides the Yana River which empties into the western part of the Yana Bay, smaller rivers of Chenedan and the Tomsk–Yurga River outflow into to the Bay in the east and in its central part. The Tomsk–Yurga River runs through the marshy coastal area.
The Yana Bay freezing lasts for about 9 months a year. In 1712, Yakov Permyakov and his companion Merkuriy Vagin, the first recorded Russian explorers of the area, crossed the Yana Bay on dogsled from the mouth of the Yana River to Bolshoy Lyakhovsky in order to explore the then unknown island. Unfortunately, Permyakov and Vagin were killed on the way back. In 1892–1894, Baron Eduard von Toll, accompanied by expedition leader Alexander von Bunge, carried out geological surveys in the area on behalf of the Russian Imperial Academy of Sciences.