The United Kingdom gives the name "Ross Dependency" to part of its claimed Antarctic territory and makes the Governor-General of the Dominion of New Zealand its administrator.

The Ross Dependency is a region of Antarctica defined by a sector originating at the South Pole, passing along longitudes 160° east to 150° west, and terminating at latitude 60° south. It is claimed by New Zealand, a claim mutually accepted only by Australia, the UK, France and Norway, which are countries that also have territorial claims in Antarctica. Under the 1961 Antarctic Treaty, of which all territorial claimants are signatories, including New Zealand, all claims are held in abeyance. Article IV states: "No acts or activities taking place while the present Treaty is in force shall constitute a basis for asserting, supporting or denying a claim to territorial sovereignty in Antarctica or create any rights of sovereignty in Antarctica".

The governor-general of New Zealand is the representative of the monarch of New Zealand, currently King Charles III. As the King is concurrently the monarch of 14 other Commonwealth realms and lives in the United Kingdom, he, on the advice of his New Zealand prime minister, appoints a governor-general to carry out his constitutional and ceremonial duties within New Zealand.

The Dominion of New Zealand was the historical successor to the Colony of New Zealand. It was a constitutional monarchy with a high level of self-government within the British Empire.