List of United States post offices in Delaware

United States post offices operate under the authority of the United States Post Office Department (1792–1971) or the United States Postal Service (since 1971). Historically, post offices were usually placed in a prominent location. Many were architecturally distinctive, including notable buildings featuring Beaux-Arts, Art Deco, and Vernacular architecture.^[1][2] However, modern U.S. post offices were generally designed for functionality rather than architectural style.^[2]

Following is a list of United States post offices in Delaware. Notable post offices include individual buildings, whether still in service or not, which have architectural, historical, or community-related significance. Many of these are listed on the National Register of Historic Places (NRHP) or state and local historic registers.

Post office	City	Date built	Image	Architect	Notes	Ref.
Old United States Post Office (Laurel, Delaware)	Laurel	1935		Louis A. Simon, Neal A. Melick	[a]	[3]
United States Post Office (Harrington, Delaware)	Harrington	1936–1937		Louis A. Simon, Neal A. Melick	[b]	[4][5]
Kenton Post Office	Kenton	1881		unknown	[c]	[6]
Old Post Office (Kirkwood, Delaware)	Kirkwood	1870		unknown	[c]	[7]
United States Post Office (New Castle, Delaware)	New Castle	1935–1936			[d]	[8][9]
United States Post Office (Rehoboth Beach, Delaware)	Rehoboth Beach	1937–1938		Louis A. Simon, Neal A. Melick	[e]	[10][11][12]
United States Post Office-Seaford, now Seaford Museum	Seaford	1935		Louis A. Simon, Neal A. Melick	[a]	[13][14]
United States Post Office (Selbyville, Delaware)	Selbyville	1940			[f]	[15][16]
Old Customshouse (Wilmington, Delaware)	Wilmington	1855		Ammi B. Young	[c]	[17]
United States Post Office, Courthouse, and Customhouse (Wilmington, Delaware)	Wilmington	1937			[c]	[18]