Why is Rarotonga the most populous island in the Cook Islands?

Rarotonga is the most populous island in the Cook Islands primarily due to its role as the nation's administrative and economic hub. As the seat of government in Avarua, the island serves as the center for political and administrative activities.123

Its economic significance is bolstered by a diverse economy that includes agriculture, light industry, and a major tourism sector, which is supported by the presence of an international airport and a major port at Avatiu. These factors contribute to generally full employment on the island, which has driven considerable internal migration from the smaller islands to Rarotonga. Additionally, the island provides essential infrastructure, including a hospital and various educational institutions, such as the Cook Islands Tertiary Training Institute, further centralizing the population.145