How wide is the portion of Antarctica that belongs to Chile?

Answer 1

Antarctica is the only place on the planet where the land isn't officially owned by anyone. A few countries have made land claims but those claims aren't officially recognized and don't cover the entire continent.

The land claimed by Chile is also claimed by Argentina, and Great Britain. Antártica is a Chilean commune in Antártica Chilena Province, Magallanes and Antártica Chilena Region, which covers all of the Territorio Chileno Antártico-the territory in Antarctica claimed by Chile. It ranges from 53°W to 90°W and from the South Pole to 60°S.

Another Answer

Antarctica is governed by The Antarctic Treaty System, which does not recognize these overlapping and multiple claims. Chile is a signatory member, with a notation that it retains a claim over the land, as above.

You can read more about the Treaty, below. The Treaty governs the planet south of 60° S.