蒂尔尼半岛是南极洲的半岛，位于埃尔斯沃思地的瑟斯顿岛东端，处于萨维奇冰川和摩根湾之间，长26公里，在1960年由美国海军发现，现时由南极条约体系管理。

Tierney Peninsula (72°23′S 95°46′W / 72.383°S 95.767°W / -72.383; -95.767) is an ice-covered peninsula about 14 nautical miles (26 km) long, between Savage Glacier and Morgan Inlet in the east end of Thurston Island. Discovered on helicopter flights from the USS Burton Island and Glacier of the U.S. Navy Bellingshausen Sea Expedition in February 1960. Named by Advisory Committee on Antarctic Names (US-ACAN) for J.Q. Tierney, oceanographer aboard the Burton Island on this expedition.