What is the biggest colony in the us today?

American Samoa
Colonial Power: United States
Colonized: Claimed by the U.S. in 1899 through a treaty with Germany; occupied by the U.S. in 1900
Area: 199 square kilometers, covering the eastern portion of the archipelago and the harbor of Pago Pago
Population: 57,496, mainly Samoans and other Pacific islanders
Language: Samoan, English
Status: Officially an "unincorporated and unorganized" territory, American Samoa is administered by the U.S. Department of the Interior’s Office of Insular Affairs; in 2006 Tokelau claimed Swains Island, which is part of American Samoa, by naming the coral atoll in a draft of its new constitution.

Ba rock that formed 1,400 million years ago!