- Post Office - Lenoir City TN"The Lenoir City Post Office is one of the state's most unadorned New Deal buildings as fa as its exterior style...the building's hipped roof, symmetrical five-bay facade, and understated classical entrance merely hint at Colonial Revival style" (Van West, 2001, p. 65). The post office contains the New Deal mural "Electrification" by David Stone Martin. Completed in 1940, this was "an appropriate location since TVA was then constructing the mammoth Fort Loudon Dam a mere couple of miles away" (Van West, 2001, p. 66).
- Post Office - Leon IAhe historic post office in Leon, Iowa was built in 1936-7 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lewisburg WVThe historic post office in Lewisburg, West Virginia was built in 1938-9 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lewiston METhe Lewiston post office was constructed using Treasury Department funds during 1934.
- Post Office - Lewistown ILThe post office in Lewistown, Illinois was constructed between 1939 and 1940 using Treasury Department funds. The building is still in use today.
- Post Office - Lexington MAThe Lexington, Massachusetts branch post office was constructed with Treasury Department funds and opened for business in 1938. The building, which houses an example of New Deal artwork, is still in service. The 1937 cornerstone reads: "Henry Morgenthau Jr Secretary of the Treasury James A Farley Postmaster General Louis A Simon Supervising Architect Neal A Melick Supervising Engineer 1937"
- Post Office - Lexington MSThe historic post office building in Lexington, Mississippi was constructed with federal Treasury Department funds during the Great Depression. The one-story, flat-roofed building remains in use as the post office today.
- Post Office - Lexington NEThe handsome post office in Lexington, Nebraska was constructed in 1934-5 with federal funds. The historic building is still in operation.
- Post Office - Liberty INThe historic Liberty post office was constructed ca. 1937 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Liberty NYThe historic post office in Liberty, New York was constructed as a with federal Treasury Department funds. The building, which was constructed in 1935-7, is still in use today.
- Post Office - Ligonier INThe historic Ligonier post office was constructed ca. 1938 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lihue HIThe historic post office building in Lihue, Hawai'i was constructed with federal Treasury Department funds. The Mission Revival-style building, which was completed in 1939, is still in use today. It is listed on the National Register of Historic Places. The building originally featured an open-air lobby. Examples of New Deal artwork that were created for the building have been relocated off-site. In the 2010s USPS proposed relocating public-facing services to a carrier facility by the airport. Residents mailed 750 postcards and 116 coconuts to protect the plan, which fell through.
- Post Office - Lincolnton NCThe historic post office in Lincolnton, North Carolina was constructed with federal Treasury Department funds in 1937. The building houses an example of New Deal artwork inside.
- Post Office - Linden NJThe historic main post office in Linden, New Jersey was constructed in 1938 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Linden TXThe historic post office in Linden, Texas was constructed with federal Treasury Department funds. The building, which was constructed in 1938, houses New Deal artwork inside and is still in use today.
- Post Office - Lindsborg KSThe historic post office in Lindsborg, Kansas was constructed with federal Treasury Department funds. The building, which was constructed in 1935, contains an example of New Deal artwork and is still in use today.
- Post Office - Lisbon NDThe historic post office in Lisbon, North Dakota was constructed with Treasury Department funds in 1939-40. An example of New Deal artwork was created for the post office lobby but was never installed, and has since been relocated.
- Post Office - Litchfield MNThe historic post office in Litchfield, Minnesota was built in 1934-5 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lititz PAThe post office in Lititz, Pennsylvania was constructed with federal funds in 1940. The building is still in use today.
- Post Office - Little Valley NYThe historic post office in Little Valley, New York was constructed with federal Treasury Department funds. The building, which was completed in 1942, is still in use today.
- Post Office - Littleton COThe post office in downtown Littleton, Colorado was constructed with Treasury Department funds in 1939. The stately building has been added to over the years and is still in service. An example of New Deal artwork created for the post office has since been relocated.
- Post Office - Livermore CAThe historic Livermore post office was constructed during the Great Depression as a New Deal project. Though the cornerstone has been partially covered by the new ADA ramp, the post office was built under Henry Morgenthau.
- Post Office - Livingston TNThe historic post office in Livingston, Tennessee was constructed in 1936-7 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lockhart TXThe historic post office in Lockhart, Texas was completed with federal Treasury Department funds in 1936. The building is still in use today.
- Post Office - Logan WVThe historic post office in Logan, West Virginia was constructed in 1937 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - London OHThe historic post office in London, Ohio was constructed in 1935 with federal Treasury Department funds. The building is still in service.
- Post Office - Long Beach NYThe historic post office building in Long Beach, New York "was built in 1936 and designed by the Office of the Supervising Architect under the direction of Louis A. Simon. It is a one-story, symmetrically massed building faced with red brick in the Colonial Revival style. It features a central five-bay-wide section with a gable roof, flanked by single bay end pavilions with gable roofs perpendicular to the central section." (Wikipedia) The building became also houses an example of New Deal artwork, and is listed on the National Register of Historic Places in 1989.
- Post Office - Long Prairie MNThe historic post office in Long Prairie, Minnesota was built in 1937-8 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Longview TXThe historic post office in downtown Longview, Texas was built in 1940 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Loudonville OHThe historic post office in Loudonville, Ohio was constructed with federal Treasury Department funds in 1936. The building, which houses an example of new Deal artwork, is still in service.
- Post Office - Louisa KYThe historic post office in Louisa, Kentucky was constructed in 1938 with federal Treasury Department funds. The building is still in service.
- Post Office - Louisburg NCThe historic post office in Louisburg, North Carolina was constructed with New Deal funds and completed in 1937. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Louisville GAThe historic post office in Louisville, Georgia was constructed in 1939 with Treasury Department funds. An example of New Deal artwork created for the building has since been relocated.
- Post Office - Louisville MSThe post office was built by the Treasury Department in 1935 in a Colonial Revival style. The post office was enlarged with an addition in 1989-90 by architects Samuel "Sambo" Mockbee, Coker, and Tom Howorth. As so many small communities have chosen to replace their historic depression-era post offices, it is of note that Louisville chose a preservation path to keep the post office, and its "art for the people" available to the community at large.
- Post Office - Loveland COThe historic downtown post office in Loveland, Colorado was constructed in 1936 with Treasury Department funds. An example of New Deal artwork created for the building is still housed in the lobby. Originally constructed as Loveland's main post office, the operation is now known as Valentine Station.
- Post Office - Lovelock NVThe historic post office building in Lovelock, Nevada was constructed with federal Treasury Department funds during the Great Depression. The building, which opened in 1938, is still in use today.
- Post Office - Lowell MIThe historic post office in Lowell, Michigan was constructed in 1940 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Lowville NYThe historic post office building in Lowville, New York was constructed with federal Treasury Department funds. The building, which was completed in 1940, houses an example of New Deal artwork inside and is still in use today.
- Post Office - Luling TXThe historic post office in Luling, Texas was constructed in 1934-5 with federal Treasury Department funds. The building is still in service.
- Post Office - Luray VAThe historic post office in Luray, Virginia was constructed in 1938 with Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.