Arcondo Nunatak is a nunatak, 780 m, standing 5 miles (8 km) south of Mount Spann in the Panzarini Hills portion of the Argentina Range, Pensacola Mountains. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1956-67. Named by Advisory Committee on Antarctic Names (US-ACAN) for Mayor Pedro Arcondo, Argentine officer in charge at General Belgrano Station, 1959-61.