The U.S. Post Office, Courthouse, and Customhouse, also known as Main Post Office and the Wilmington Trust Headquarters, is a historic post office, courthouse, and custom house, located on Rodney Square in Wilmington, New Castle County, Delaware.

It was designed by Irwin & Leighton in 1933–1935, and building was completed in 1937.

ft.[3] It was listed on the National Register of Historic Places in 1979.

[1] A modern Wilmington Trust office building now emerges from the facade.

This article about a property in Delaware on the National Register of Historic Places is a stub.