What was the smallest country in british empire?

The smallest country (by land area) that was a part of the British Empire was Pitcairn Islands. Pitcairn Islands is a group of islands in the South Pacific Ocean that has an area of just 47 square kilometres (18 square miles). The islands were first settled by British mutineers in 1790 and were officially annexed by the British in 1838. Pitcairn Islands is a British Overseas Territory and is currently inhabited by about 50 people.