Largest State in Antarctica?

Trick question: Antarctica has no states.

It is a continent governed by the Antarctic Treaty System (1959), signed by 56 nations. The treaty:

• Freezes all territorial claims (7 claimants: Argentina, Australia, Chile, France, NZ, Norway, UK).
• Designates continent for "peace and science."
• Bans military activity, mining, nuclear testing.

Research stations (McMurdo, Amundsen-Scott, Vostok, etc.) are operated by national programs, not subnational governments. No permanent population, no political subdivisions.