None.
None.
None.
None.
There is no Atlantic Circle. The Antarctic Circle passes through no countries. See the related link for a map of the Antarctic Circle.
None.
None.
None. No states or countries either.
The Antarctic Circle passes through Antarctica, which is a continent with no countries.
None. There are no countries, cities, or permanent human residents on Antarctica, and that's the only continent the Antarctic Circle crosses.
None. Any land that the Antarctic Circle crosses is part of the continent of Antarctica, which is not carved up into countries.
None.
Countries representing about 80% of the earth's population have either signed or ratified the Antarctic Treaty.