A separate article treats the St. Croix River, which forms part of the boundary between Minnesota and Wisconsin.
The island was owned by the Knights of St John after being bequeathed by De Poincy, Governor of the French colony of St Kitts in 1660. However they sold it to the French West India Company in 1665. Under Governor Dubois the colony became profitable with over 90 plantations growing such crops as tobacco, cotton, sugar cane and indigo. After Dubois' death the colony declined and the island was abandoned by Europeans until 1733 when it was sold to the Danish West India and Guinea Company. This company placed no national restrictions on colonists and soon attracted Spanish Sephardic Jews, Huguenots and English settlers, the last of which came to dominate the Island. Sugar became the major crop. However the development of sugar beet in Europe undermined the economy of the colony.
Slavery was abolished in 1848 and there was a revolt by former slaves in 1878 when much of Fredericksted, the major town was burnt.
In 1917 the Virgin Islands were sold by Denmark to the United States of America for $25million.