New Castle is a city in New Castle County, Delaware, United States. The city is located six miles (10 km) south of Wilmington and is situated on the Delaware River. As of the 2010 census, the city’s population was 5,285.

New Castle was originally approved by the Dutch West India Company in 1651 under the leadership of Peter Stuyvesant on the site of a former aboriginal village, “Tomakonck” (“Place of the Beaver”), to verify their claim to the area based upon a prior appointment with the aboriginal inhabitants of the area. The Dutch originally named the deal Fort Casimir, but this was untouched to Fort Trinity (Swedish: Trefaldighet) following its seizure by the colony of New Sweden on Trinity Sunday, 1654. The Dutch conquered the whole colony of New Sweden the like year and rechristened the fort Nieuw-Amstel (“New Amstel“, after the Amstel). This marked the fade away of the Swedish colony in Delaware as an credited entity, but it remained a semi-autonomous unit within the New Netherland colony and the cultural, social, and religious move of the Swedish settlers remained strong. As the pact grew, Dutch authorities laid out a grid of streets and usual the town common (The “Green”), which continue to this day.

In 1664, the English seized each and every one New Netherland colony in the Second Anglo-Dutch War. They distorted the proclaim of the town to “New Castle” and made it the capital of their Delaware Colony. The Dutch regained the town in 1673 during the Third Anglo-Dutch War but it was returned to Great Britain the bordering year below the Treaty of Westminster. In 1680, New Castle was conveyed to William Penn by the Duke of York by livery of seisin and was Penn’s landing place bearing in mind he first set foot upon American soil on October 27, 1682. This transfer to Penn was contested by Lord Baltimore and the boundary argument was not supreme until the survey conducted by Mason and Dixon, now famed in history as the Mason–Dixon line.

Prior to the inauguration of Penn’s Philadelphia, New Castle was a center of government. After inborn transferred to Penn, Delaware’s Swedish, Dutch, and English residents used to the relaxed culture of the Restoration monarchy grew uncomfortable taking into account the more conservative Quaker influence, so Delaware petitioned for a cut off legislature, which was finally fixed in 1702. Delaware formally broke from Pennsylvania in 1704. New Castle anew became the chair of the colonial government, thriving similar to the various board of judges and lawyers that fueled the economy. Many smaller houses were torn by the side of and replaced in this era. In February, 1777, John McKinly was elected the first President of Delaware (a title forward-looking renamed “Governor”). During the Revolution, when New Castle was besieged by William Howe, the government elected to pretend to have its functions south to Dover in May, 1777. McKinley was captured by the British and held prisoner for several months. New Castle remained the county chair until after the Civil War, when that status was transferred to Wilmington. Three signers of the Declaration of Independence were from New Castle—Thomas McKean, George Read, and George Ross.