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Wilmington is the largest city in the state of Delaware, United States, and is located at the confluence of the Christina River and Brandywine Creek, near where the Christina flows into the Delaware River. It is the county seat of New Castle County and one of the major cities in the Delaware Valley metropolitan area. Wilmington was named by Proprietor Thomas Penn after his friend Spencer Compton, Earl of Wilmington, who was prime minister in the reign of George II of Great Britain.

According to the 2010 census, the population of the city is 70,851, a decrease of 2.4% from 2000.

The city sits at the confluence of the Christina River and the Delaware River, about 25 miles (40 km) southwest of Philadelphia, Pennsylvania. Its transportation links and geographic proximity give Wilmington some of the characteristics of a satellite city to Philadelphia, but Wilmington's long history as Delaware's principal city, its urban core, and its independent value as a business destination makes it more properly considered a small but independent city in the Philadelphia metropolitan area.

Wilmington lies along the Fall Line geological transition from the Mid-Atlantic Piedmont Plateau to the Atlantic Coastal Plain. East of Market Street, and along both sides of the Christina River, the Coastal Plain land is flat, low-lying, and in places marshy. The Delaware River here is an estuary at sea level (with twice-daily high and low tides), providing sea-level access for ocean-going ships.

Much of Wilmington's economy is based on its status as the most populous and readily accessible city in Delaware, a state that made itself attractive to corporations with business-friendly financial laws and a longstanding reputation for a fair and effective judicial system. Wilmington has become a national financial center for the credit card industry, largely due to regulations enacted by former Governor Pierre S. du Pont, IV in 1981.

en.wikipedia.org/wiki/Wilmington,_Delaware