Yes it is known as "Amerika Samoa" and the currency is the US dollar as it continues to be a protectorate of the United States. There is also "Samoa" which was the New Zealand portion of the main Samoan Lush hillsides in Pago Pago islands but it is independent and known simply as Samoa. This is Polynesia at its core - it is lush, laid-back and beautiful. There is a National Park here that is actually spread out among three islands and is of course the only American park south of the equator. But the whole place is a national park - the tiny place we visited is Pago Pago (pronounced "Pango Pango") and is set in dense lush forested mountains. There are trees laden with mangoes, papaya, bananas and other tropical fruits all over the mountainsides, and they all border a lovely harbour full of fishing boats and travelling sailboats. Apparently there are strict building bylaws that restrict the height of buildings and so the natural beauty of Pago Pago is unhindered by major development. The residents are incredibly friendly and definitely seem more linked to their Polynesian neighbours of Tonga, Fiji and the region than their closest American compatriots.
Pago Pago harbour
All the photos from this lovely island can be viewed in the "Amerika Samoa" gallery under the "2019 - SOUTH PACIFIC" collection.