The Pitcairn Islands (/ˈpɪtkɛərn/; Pitkern: Pitkern Ailen), officially Pitcairn, Henderson, Ducie and Oeno Islands, are a group of four volcanic islands in the southern Pacific Ocean that form the sole British Overseas Territory in the South Pacific Ocean. The four islands—Pitcairn proper, Henderson, Ducie and Oeno—are scattered across several hundred miles of ocean and have a combined land area of about 18 square miles (47 km2). Henderson Island accounts for 86% of the land area, but only Pitcairn Island is inhabited. The nearest places are Mangareva (of French Polynesia) to the west and Easter Island to the east.
Pitcairn is the least populous national jurisdiction in the world. The Pitcairn Islanders are a biracial ethnic group descended mostly from nine Bounty mutineers and the handful of Tahitians who accompanied them, an event that has been retold in many books and films. This history is still apparent in the surnames of many of the islanders. Today there are approximately 50 permanent inhabitants, originating from four main families.