Ducie Island in the context of "Pitcairn Island"

The Pitcairn Islands (/ˈpɪtkɛərn/ PIT-kairn; 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 Pacific Ocean. The four islands—Pitcairn, Henderson, Ducie and Oeno—are scattered across several hundred kilometres (miles) of ocean and have a combined land area of about 47 square kilometres (18 square miles). Henderson Island accounts for 86% of the land area, but only Pitcairn Island is inhabited. The inhabited islands nearest to the Pitcairn Islands are Mangareva (of French Polynesia), 688 km (428 miles) to the west, as well as Easter Island, 1,929 km (1199 miles) to the east.

The Pitcairn Islanders are descended primarily from nine British HMS Bounty mutineers and twelve Tahitian women. In 2023, the territory had a permanent population of 35, making it the smallest territory in the world by number of permanent residents. Owing to the island's extreme isolation and small population, incidents of widespread sexual abuse went undetected until 1999, culminating in a high-profile sexual assault trial in 2004.

Henderson Island is an uninhabited island in the south Pacific Ocean. It is part of the Pitcairn Island Group, together with Pitcairn, Oeno, and Ducie Islands. Measuring 9.6 by 5.1 kilometres (6.0 mi × 3.2 mi), it has an area of 37.3 km (14.4 sq mi) and is located 193 km (104 nmi; 120 mi) northeast of Pitcairn Island, which is the only inhabited island of the group. It has poor soil and little fresh water, and is unsuitable for agriculture. There are three beaches on the northern end and the remaining coast comprises steep (mostly undercut) cliffs up to 15 m (50 ft) in height. In 1902, it was annexed to the Pitcairn Islands colony, which is now a British Overseas Territory.

Henderson is one of the last two raised coral atolls in the world whose ecosystems remain relatively unaffected by human contact, along with Aldabra in the Indian Ocean. In 1988, it was designated a World Heritage Site by the United Nations. Ten of its 51 flowering plants, all four of its land birds and about a third of the identified insects and gastropods are endemic – a remarkable diversity given the island's size.

Oeno Island (/oʊˈiːnoʊ/ oh-EE-noh) or Holiday Island is an uninhabited coral atoll in the South Pacific Ocean, part of the Pitcairn Islands overseas territory. It is part of the Pitcairn Island Group, together with Pitcairn, Henderson and Ducie islands.