McMurdo Station is an American Antarctic research station located on the southern tip of Ross Island. Operated by the United States through the United States Antarctic Program (USAP), which is a branch of the National Science Foundation, it serves as one of three year-round science facilities on the continent. It is currently the largest community in Antarctica, with the capacity to support up to 1,200 residents during peak seasons, though the population drops to fewer than two hundred people during the Antarctic night.
The station functions as a primary hub for Antarctic activities and science projects. Personnel and cargo destined for the Amundsen–Scott South Pole Station typically transit through McMurdo via flight or the McMurdo to South Pole Traverse. The facility features a heliport, while its main airfields, Phoenix Airfield and Williams Field, are built on ice to the south. While Winter Quarters Bay serves as the base seaport, access can be restricted by weather and sea ice conditions.
McMurdo Station is situated near New Zealand's Scott Base and the Arrival Heights Laboratory. The station is powered by a combination of wind power and generators; it previously utilized a nuclear reactor during the 1960s. Under the Antarctic Treaty System, the base is dedicated to scientific research rather than serving as a legal territorial claim.