Dolinsk (Russian: Долинск; Japanese: 落合) is a town and the administrative center of Dolinsky District of Sakhalin Oblast, Russia, located in the southeast of the Sakhalin Island in the valley of the Naiba River and its tributaries, about 45km north of Yuzhno-Sakhalinsk and 10km from the coast of the Terpeniye Bay of the Sea of Okhotsk. Population:
