Coordinates: 9°2′52.30″N 167°44′34.80″E / 9.0478611°N 167.7430000°E
Omelek Island (/ˈoʊməlɛk/; Marshallese: Kom̧le, pronounced [kʷo͡ɤmˠ(ɤ͡e)lʲee̯]) is part of the Kwajalein Atoll in the Republic of the Marshall Islands. It is controlled by the United States military under a long-term lease (along with ten other islands in the atoll) and is part of the Ronald Reagan Ballistic Missile Defense Test Site.
The Island is about 32,000 square metres (7.9 acres) in size. Geologically, it is composed of reef-rock, as are the other islands in the atoll, which is created by the accumulation of marine organism remnants (corals, Mollusca, etc.)
Omelek has long been used by the United States for small research rocket launches due to its relative isolation in the South Pacific. The last U.S. government rocket launch occurred in 1996.