The Republic of the Marshall Islands is a Micronesian nation of atolls and islands in the middle of the Pacific Ocean, just west of the International Date Line and just north of the Equator. The population is about 62,000. In 1986 independence was attained under a Compact of Free Association with the United States.
The country consists of 29 atolls and 5 isolated islands. The atolls and islands form two groups: the Ratak Chain and the Ralik Chain (meaning "sunrise" and "sunset" chains). 24 of them are inhabited. (source) Thank you Winston!