Tarawa is an atoll and the capital of the Republic of Kiribati, in the Micronesia region of the central Pacific Ocean. It comprises North Tarawa, which has 6,629 inhabitants and much in common with other more remote islands of the Gilbert group, and South Tarawa, which has 56,388 inhabitants as of 2015, half of the country's total population. The atoll was the site of the Battle of Tarawa during World War II.

An atoll is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical parts of the oceans and seas where corals can develop. Most of the approximately 440 atolls in the world are in the Pacific Ocean.