https://en.wikipedia.org/wiki/Palmyra_Atoll

Palmyra Atoll has no permanent population, but there are a steady stream of temporary staff and visitors for research, tourism, and other projects such as marine science or survey work. It is administered as an incorporated unorganized territory, presently the only one of its kind, by the United States Fish and Wildlife Service of the United States Department of the Interior. The territory hosts a variable transient population of 4–25 staff and scientists employed by various departments of the U.S. government and by The Nature Conservancy,[3] as well as a rotating mix of Palmyra Atoll Research Consortium[4] scholars. Submerged portions of the atoll are administered by the Department of the Interior's Office of Insular Affairs.[5]