Aitutaki, also traditionally known as Araʻura and Utataki, is the second most-populated island in the Cook Islands, after Rarotonga. It is an "almost atoll", with fifteen islets in a lagoon adjacent to the main island. Total land area is 18.05 km2 (6.97 sq mi), and the lagoon has an area of between 50 and 74 km2. A major tourist destination, Aitutaki is the second most visited island of the Cook Islands archipelago.

The Cook Islands is an island country in Polynesia, part of Oceania in the South Pacific Ocean. It consists of 15 islands whose total land area is approximately 236.7 square kilometres (91 sq mi). The Cook Islands' Exclusive Economic Zone (EEZ) covers 1,960,027 square kilometres (756,771 sq mi) of ocean. Avarua is its capital.