on W coast of Popof I., in Shumagin Is., Aleutian Range. 0.7 mile wide.
Named in 1872 by W. H. Dall, U.S. Coast and Geodetic Survey (USC&GS), for Survey schooner Humboldt.
Balboa Bay, Baralof Bay, Ben Green Bight, Blind Breaker, Coal Harbor, Delarof Harbor, Fox Hole, Humboldt Harbor, Lefthand Bay, Lumber Bay, Mud Bay, Pirate Cove, Red Cove, Shoal Bay, Simeon Bay, Zachary Bay,
Arch Rock, Cross Island, Egg Island, Egg Island, Elephant Rock, Gull Island, Halfway Rock, Henderson Island, High Island, Kelly Rock, Little Egg Island, Popof Island, Range Island, Range Islet, Round Island, Unga Island,