Between Umak Island and Little Tanaga Island, Aleutian Islands.
Name derived from Umak Island, and given by members of the U.S. Navy Aleutian Island Survey Expedition in 1934.
Aankuuga, Agamaxchizalix, Alugasux, Azamis Cove, Chalux, Chigulam Udaa, Chisak Bay, Chuhngudugis, Hanimisax, Hanisxa, Igitkin Bight, Iiqiisix, Liisis Tatuu, Naagix Adimtusix, Nahmagix, Piper Cove, Qagaagix Chalux, Qahnichxucha, Qigaagix Adimtusix, Qigaangax, Round Cove, Saamlus, Sand Bay, Scripps Bay, Shelter Cove, Tana Bight, Ugiilagaadax, Ulgusix, Umak Bight, Uuhmugzux, Yoke Bay,
Aalux, Agony Point, Bugle Point, Cape Agumsadak, Cape Akuyan, Cape Azamis, Cape Chakik, Cape Chisak, Cape Kiugilak, Cape Lises, Cape Ruin, Cape Umak, Elbow Point, Igitkin Point, Knaxchiing, Moss Point, Narrows Point, Passage Point, Qatxayas Yaaga, Reach Point, Rip Point, Tana Point, Tanagam Amaga, Tanager Point, Zaliva Point,
Amgasis, Anagaksik Island, Asuksak Island, Atangax, Aziak Island, Box Island, Chaika Rock, Chisak Island, Great Sitkin Island, Igitkin Island, Kanu Island, Little Tanaga Island, Rip Rock, Silak Island, Tagadak Island, Tanaklak Island, Tanax Angunax, Ulak Island, Umak Island,