Baker Island, once known as New Nantucket in the early 19th century, is a small, uninhabited atoll located just north of the Equator in the central Pacific Ocean, approximately 1,920 miles (3,090 kilometres) southwest of Honolulu. Positioned almost halfway between Hawaii and Australia, its closest neighbor is Howland Island, situated 42 mi (68 km) to the north-northwest. Both Baker and Howland Islands have been claimed as territories of the United States since 1857, though the United Kingdom regarded them as part of the British Empire between 1897 and 1936 but did not actually annex them. They were not being used when a U.S. colonization attempt was started in 1935, and the next year formal reassertion of U.S. sovereignty was issued. During World War II the Japanese Empire attacked the island, and it was evacuated and a small military base was established. The island was an important navigation beacon in the remote Pacific waters during and after World War II. In the 1970s it was made into a nature preserve and has remained so into the 21st century.
Covering an area of 0.81 sq mi (2.1 km), with 3.0 mi (4.8 km) of coastline, Baker Island experiences an equatorial climate, characterized by average temperatures around 80 °F (27 °C), minimal rainfall, persistent winds, and strong sunlight. The terrain is flat and sandy, surrounded by a narrow fringing reef. Unlike many atolls, Baker Island lacks a central lagoon, with its highest point being 26 ft (7.9 m) above sea level.