Abaiang, also known as Apaiang, Apia, and in the past, Charlotte Island, in the Northern Gilbert Islands, is a coral atoll of Kiribati, located in the west-central Pacific Ocean. Abaiang was the island of the first missionary to arrive in the Gilberts, Hiram Bingham II. Abaiang has a population of 5,872.

The Gilbert Islands are a chain of sixteen atolls and coral islands in the Pacific Ocean, about halfway between Papua New Guinea and Hawaii. They constitute the main part of the nation of Kiribati.