Penn Farm of the Trustees of the New Castle Common

The Bellanca Airfield was an airfield, aircraft plant, and service hangar built in 1928 by Giuseppe Bellanca and Henry B. DuPont in New Castle, Delaware. Located off Route 273 near the Delaware River, the plant produced approximately 3000 aircraft before closing in 1954. The only surviving part of the airfield is the former Air Service, Inc. hangar, which was listed on the National Register of Historic Places in 2005.

The Bellanca Airfield Museum is an aviation museum located in New Castle, Delaware focused on the history of Bellanca Airfield.

William Penn High School, also known as William Penn or simply Penn, is a four-year comprehensive, coeducational public high school located in unincorporated New Castle County, Delaware, United States. It is adjacent to the New Castle city limits and has a New Castle postal address. The school is a member of the Colonial School District, and is the largest high school in the state of Delaware. The school mascot is the Colonial. In addition to New Castle the school district includes Delaware City, Port Penn, St. Georges, Wilmington Manor, portions of Wilmington, and half of Bear.

Delaware Valley Classical School is a private, K-12 classical Christian school located in New Castle, Delaware. For the 2023–24 academic year, enrollment was approximately 190 students, with approximately 30 faculty and staff.

Hares Corner is an unincorporated community in New Castle County, Delaware, United States. Hares Corner is located at the intersection of U.S. Route 13/U.S. Route 40 and Delaware Route 273, west of New Castle and immediately south of Wilmington Airport.

The Pratt Student Center opened in 2013 after a remodeling of the Pratt Gymnasium. The Pratt Gymnasium was a 600-seat multi-purpose arena in New Castle, Delaware, on the campus of Wilmington University. It was home to the Wilmington University Wildcats and formerly the home of the Delaware Stars, a basketball team in the USBL.

Army Creek is a 4-mile (6.4 km) long river in northern Delaware in the United States that drains about 10 square miles (26 km2). The stream is controlled by a floodgate just downstream of DE 9 that does not allow tidal influence of the stream.The source of Army Creek is near the eastern edge of Bear, Delaware in the south and New Castle County Airport in the north. The water then flows ENE to the Delaware River about 1 mile (1.6 km) SW of New Castle, Delaware, at Dobbinsville. Most of the watershed is urban/residential. The watershed is the scene of two Superfund sites owing to the urban/industrial history.

Stonum, also called Stoneham, is a historic house at 900 Washington Avenue in New Castle, Delaware. Its main section built about 1750, it was the country home of George Read (1733-1798), a signer of the Declaration of Independence. His advocacy enabled Delaware to become the first state ratifying the declaration. The house was declared a National Historic Landmark in 1973. It is the only building standing associated with this Founding Father.

Wilmington Airport (IATA: ILG, ICAO: KILG) (formerly known as New Castle Airport, New Castle County Airport, sometimes referred to as Wilmington-New Castle Airport, or to a lesser extent Wilmington/Philadelphia Regional Airport and Greater Wilmington Airport) is an airport located in unincorporated New Castle County, Delaware, near Wilmington, Delaware. Owned by New Castle County and operated under a lease agreement with the Delaware River and Bay Authority, it is five miles (8 km) south of Wilmington and about 30 miles (50 km) from Philadelphia. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a non-hub primary commercial service facility.Federal Aviation Administration records say the airport had 642 passenger boardings (enplanements) in calendar year 2011 and 1,064 passenger boardings in 2012. Thanks to the inauguration of service by Frontier Airlines, 2013 enplanements increased to 52,456, though Frontier ceased its Delaware service in 2015. Frontier resumed service to Wilmington in February 2021 but discontinued service again in June 2022. Avelo Airlines has since started service to Wilmington in February 2023.

New Castle National Guard Base is a United States Air Force installation under the control of the Delaware Air National Guard, located at Wilmington Airport in New Castle County, Delaware.

The New Castle Range Rear Light is a lighthouse in Delaware, United States, on the Delaware River near New Castle, Delaware.

Wilmington Manor is a census-designated place (CDP) in north-eastern New Castle County, Delaware, United States. The population was 7,889 at the 2010 census.