미국(K) 하와이주(州) 호놀룰루에 딸린 섬. 면적 3.8 km2. 태평양 중부 라인제도 북쪽 끝에 있다. 1802년 미국 선박 팔미라호(號)에 의하여 발견된 환초(環礁)이다.

그 후 하와이 왕국령, 영국(G) 왕국령을 거쳐 1912년 이래 미국령이 되었다.

 The Kingdom of Hawaii claimed the atoll in 1862, and the US included it among the Hawaiian Islands when it annexed the archipelago in 1898. The Hawaii Statehood Act of 1959 did not include Palmyra Atoll, which is now privately owned by the Nature Conservancy. This organization is managing the atoll as a nature preserve. The lagoons and surrounding waters within the 12 nautical mile US territorial seas were transferred to the US Fish and Wildlife Service and were designated a National Wildlife Refuge in January 2001.