What is the island group called which is also the 50th state of the USA?

Explanation

Hawaii is an American state located in the Pacific Ocean around 3,700 km southwest of the west coast of the USA. It was admitted to the union as the 50th state in 1956. It is the southernmost state in the US, and the only state to be entirely made up by islands. The capital is called Honolulu and lies on the island Oahu. The official languages are English and Hawaiian.