The U.S. Post Office, Courthouse, and Customhouse, also known as Main Post Office, 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. It is in the Classical Revival. It is a three-story, cut stone structure with six large stone pillars across the main entrance. the gross building area is 104,669 sq. ft. It now serves as Wilmington Trust headquarters.It was listed on the National Register of Historic Places in 1979.
