Bobrof Island () is one of the Andreanof Islands subgroup of the Aleutian Islands in southwestern Alaska, United States. Bobrof Island is a small, uninhabited island about north and west of Kanaga Island, and northeast of Cape Sudak on Tanaga Island. Bobrof Island is long and wide with an area of , and consists primarily of the high Bobrof Volcano. The volcanic crater, or cone, has been heavily dissected. Underwater deposits adjacent to the island's northeast flank suggest an immense debris-avalanche has taken place.