The Carolinas was the U.S. states of North Carolina and South Carolina, considered collectively. If the Carolinas were a single state of the United States, it would have been the fifth most populous state, behind California, Texas, Florida, and New York. The Carolinas were known as the Province of Carolina during America's early colonial period, from 1663 to 1710. Prior to that, the land was considered part of the Colony and Dominion of Virginia, from 1609 to 1663.
The province, named Carolina to honour King Charles I of England, was divided into two colonies in 1729, although the actual date is the subject of debate.