That depends on what "close" means to you. If your sense of 'closeness' is sufficiently sensitive, EVERY country might qualify. The country that has some territory MOST CLOSE to Antarctica but not on it, is Chile.
Argentina, Chile and Australia, plus New Zealand are all 'close' to Antarctica.
Arctic and Antarctica
because it is very close to the continent antarctica
Both Chile and Argentina, close to Antarctica.
at the southern tip of Chile. its very close to Antarctica.
Chile is the most southern country in the world, with regions that extend close to the South Pole.
The tip of South America is 'close' to Antarctica, as is New Zealand. The continent of Antarctica is surrounded by the Southern Ocean.
No country is in possession of Antarctica.
Antarctica is a possession of no country.
Chile, Argentina, Australia, New Zealand
The Arctic is opposite Antarctica. Like Antarctica, no country owns the Arctic
Every country on earth is due north of Antarctica.