Adamstown is the capital of the Pitcairn Islands, and the only settlement on the Pitcairn Islands, the only British Overseas Territory that is located in the southern Pacific Ocean.

The Pitcairn Islands, 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 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 inhabited islands nearest to the Pitcairn Islands are Mangareva, 688 km to the west, as well as Easter Island, 1,929 km to the east.