摩根湾是南极洲的海湾，位于埃尔斯沃思地的瑟斯顿岛东端，处于洛夫格伦半岛和蒂尔尼半岛之间，长约33公里，在1960年由美国海军发现，现时由南极条约体系管理。

Morgan Inlet is an ice-filled inlet about 18 nautical miles (33 km) long, with two branches, indenting the east end of Thurston Island, Antarctica, between Lofgren Peninsula and Tierney Peninsula. It was discovered in helicopter flights from the U.S. Navy Bellingshausen Sea Expedition in February 1960, and was named by the Advisory Committee on Antarctic Names for Lieutenant Commander Joseph R. Morgan, U.S. Navy, a hydrographic and oceanographic officer of U.S. Navy Task Force 43 during this expedition.