on E shore of Kalsin Bay, 12 mi. S of Kodiak, Kodiak I.
Local name reported in 1951 by U.S. Geological Survey (USGS); published in 1949 by U.S. Geological Survey (USGS) as "Isthmus Cove."
Brookers Lagoon, Chiniak Bay, Cook Bay, Crab Lagoon, Gibson Cove, Helen Bay, Isthmus Bay, Kalsin Bay, Kodiak Harbor, Little Cove, Middle Bay, Mill Bay, Monashka Bay, Pasagshak Bay, Saint Herman Bay, Saint Herman Harbor, Saint Paul Harbor, Shahafka Cove, Vera Bay, Womens Bay,
Broad Point, Bruhn Point, Cape Chiniak, Cape Greville, Chiniak Point, Cliff Point, Frye Point, Icehouse Point, Isthmus Point, Midway Point, Miller Point, Narrow Cape, Nyman Peninsula, Pasagshak Point, Pasagshak Point, Pony Point, Sawmill Point, Sequel Point, Shannon Point, Spruce Cape,
Bettinger A Dam, Chiniak Satellite Tracking Station Dam, Lake Bettinger B Dam, Lake Bettinger C Dam, Lake Bettinger D Dam, Pillar Creek 2 Main Dam Dike C, Pillar Creek Dam Number 2 Dike A, Pillar Creek Dam Number 3, Pillar Creek Number 1 Upper Dam A, Pillar Creek Number 1 Upper Dam B, Pillar Creek Number 2 Dike B Dam, Stovers Dam, Upper Reservoir Dam,
Bird Island, Blodgett Island, Chiniak Island, Cliff Island, Crooked Island, Gull Island, Hanin Rock, Holiday Island, Humpback Rock, Inner Humpback Rock, Isthmus Island, Jug Island, Kalsin Island, Kekur Island, Kulichkof Island, Long Island, Mary Island, Middle Island, Near Island, Popof Island, Puffin Island, Queer Island, Refuge Island, Rocky Islet, Round Island, Svitlak Island, Twin Islet, Ugak Island, Uski Island, Utesistoi Island, Viesoki Island, Woody Island, Zaimka Island,
Abercrombie Lake, Barry Lagoon, Beaver Lake, Bull Lake, Buskin Lake, Lake Catherine, Chiniak Lagoon, Chiniak Lake, Dark Lake, Dolgoi Lake, Dragonfly Lake, East Twin Lake, Elephant Lake, Genivieve Lake, Heitman Lake, Hidden Lakes, Horseshoe Lake, Icehouse Lake, Island Lake, Jupiter Lake, Kalsin Pond, Lilly Lake, Lily Pond Lake, Long Lake, Lake Louise, Lupin Lake, Mayflower Lake, Mission Lake, Neptune, Peninsula Lake, Potatopatch Lake, Lake Rose Teed, Salt Lake, Saturn Lake, Sawmill Lake, Snag Lake, Southern Lake, Tanignak Lake, Twin Lakes, Lake Una, Uranus,
Bear Creek, Black Canyon Creek, Devils Creek, East Fork Twin Creek, Frank Creek, Kalsin Creek, Mayflower Creek, Myrtle Creek, Pillar Creek, Roslyn Creek, Salonie Creek, Salt Creek, Twin Creek, West Fork Twin Creek, Zenter Stream,