Wilmington University is a private university with its main campus in New Castle, Delaware. It was founded in 1968 as Wilmington College by educator Dr. Donald Ross. As of 2016, the university served a total student body of 20,522 undergraduate and postgraduate students in nearly 100 degree and certificate programs. The university's programs are offered at its main campus in historic New Castle as well as at six additional campuses in Delaware, several partnership locations in New Jersey, and a single partnership location in northeastern Maryland.

New Castle is a city in New Castle County, Delaware, United States, six miles (10 km) south of Wilmington, and situated on the Delaware River. According to the 2010 Census, the population of the city is 5,285.