尼科尔森半岛是南极洲的半岛，位于罗斯属地，处于罗斯冰架西部，长约28公里，该半岛以美国海军上将命名，现时由南极条约体系管理。

Nicholson Peninsula (80°43′S 160°30′E / 80.717°S 160.500°E / -80.717; 160.500) is a broad ice-covered peninsula about 15 nautical miles (28 km) long, between Couzens Bay and Matterson Inlet on the west side of Ross Ice Shelf. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain M.W. Nicholson, U.S. Navy, chief of staff to the U.S. Antarctic Projects Officer during Operation Deepfreeze 1964.