Brandywine Hundred is the name of an unincorporated subdivision of New Castle County, Delaware, United States. Hundreds were once used as a basis for representation in the Delaware General Assembly. Brandywine Hundred is a commonly used colloquial name for this area. However, while their names still appear on all real estate transactions, all other hundreds in Delaware presently have no meaningful use or purpose except as a geographical point of reference. In the 2010 census, Brandywine had 77,182 people.