The Lower Counties on the Delaware, was a semi-autonomous region of the proprietary Province of Pennsylvania and a de facto British colony in North America. Although not royally sanctioned, Delaware consisted of the three counties on the west bank of the Delaware River Bay.
In the early 17th century, the area was inhabited by Lenape and possibly Assateague Indian tribes. The first European settlers were Swedes, who established the colony of New Sweden at Fort Christina in present-day Wilmington, Delaware, in 1638. The Dutch captured the colony in 1655 and annexed it to New Netherland to the north. England subsequently took control of it from the Dutch in 1664. In 1682, William Penn, the Quaker proprietor of the Province of Pennsylvania to the north leased the three lower counties on the Delaware River from James, the Duke of York, who went on to become King James II.