Derbin Island is located in the Krenitzin Islands, a subgroup of the Fox Islands in the eastern Aleutian Islands, Alaska, United States. Derbin is a small island (at 0.5 mi across) and is situated near the southwestern shore of Tigalda Island. It is measuring 840 m long and 204 m wide. It was named in 1935 by the United States Coast and Geodetic Survey because of its proximity to Derbin Strait, the channel between Avatanak and Tigalda islands. Derbin Strait, in turn, is derived from "Derbenskoy," the Russian name published by Father Veniaminov (1840).