Kingman Reef is a largely submerged, uninhabited triangular shaped reef, 9.5 nautical miles (18 km) east-west and 5 nautical miles (9 km) north-south, located in the North Pacific Ocean, roughly half way between the Hawaiian Islands and American Samoa. It is the northernmost of the Northern Line Islands and lies 36 nautical miles (67 km) northwest of the next closest island (Palmyra Atoll), and 930 nautical miles (1,720 km) south of Honolulu.
Kingman Reef has the status of an unincorporated U.S. possession of the United States, administered from Washington, DC by the U.S. Department of Interior. The atoll is closed to the public. For statistical purposes, Kingman Reef is grouped as part of the United States Minor Outlying Islands. In January 2009, Kingman Reef was designated a marine national Monument.