- Post Office - Scottdale PAThe historic post office in Scottdale, Pennsylvania was constructed in 1934 with federal Treasury Department funds. The building, which houses examples of New Deal artwork, is still in service.
- Post Office - Scottsboro ALThe historic post office in Scottsboro, Alabama was constructed in 1938 with federal Treasury Department funds. The building, which houses New Deal artwork inside, is still in use today.
- Post Office - Sebastopol CAThe historic post office in Sebastopol, California was completed in 1936 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in use today.
- Post Office - Sebring OHThe historic post office in Sebring, Ohio was constructed in 1935 with federal Treasury Department funds. The building is still in service.
- Post Office - Sedro-Woolley WAConstructed by the US Treasury in 1939.
- Post Office - Selbyville DEThe historic post office in Selbyville, Delaware was constructed ca. 1940 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Selinsgrove PAThe historic post office building in Selinsgrove, Pennsylvania was constructed with federal Treasury Department funds and opened in . The building, which houses a New Deal mural in its lobby, is still in use today.
- Post Office - Sellersville PAThe historic post office building in Sellersville, Pennsylvania was constructed with federal Treasury Department funds and opened in . The building, which houses a New Deal mural in its lobby, is still in use today.
- Post Office - Selma CAThe Selma, California post office was constructed with federal funds. The building was completed in 1937 and is still in use today.
- Post Office - Seminole OKThe post office in Seminole was completed in 1937 with funds provided by the Treasury Department. Bertram E. Giesecke was the architect, supervised by Louis A. Simon. Neal A. Melick was the supervising engineer. It is also the site of Acee Blue Eagle's 1939 mural, "Seminole Indian Village Scene," completed with funds provided by the Treasury Section of Fine Arts and viewable in the lobby.
- Post Office - Seneca KSBuilt in 1938.
- Post Office - Seward NEThe historic post office in Seward, Nebraska was constructed with federal funds. The building, which opened in 1936, is still in use today.
- Post Office - Seymour TXThis New Deal post office was constructed in 1940.
- Post Office - Shamrock TXConstructed by the Treasury Department in 1935.
- Post Office - Shawano WIConstructed by the Treasury Department in 1937.
- Post Office - Sheboygan WIThe Sheboygan Post Office was constructed with the help of New Deal funds circa 1934.
- Post Office - Shelbyville ILThe historic post office in Shelbyville, Illinois was constructed in 1940 with federal Treasury Department funds. The building is still in use today.
- Post Office - Shelton CTThe historic Shelton, Connecticut post office was constructed in 1939 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in service.
- Post Office - Shelton WAThe post office in Shelton was completed in 1938 with funds provided by the Treasury Department. It is also the site of Richard Haines's 1940 mural, "Skid Row," completed with funds provided by the Treasury Section of Fine Arts and viewable in the lobby.
- Post Office - Shenandoah PAThe Shenandoah Post Office was constructed in 1936 with Treasury Department funds.
- Post Office - Shorewood WIThe historic branch post office in Shorewood, Wisconsin was constructed in 1937 with federal Treasury Department funds. The building is still in service.
- Post Office - Short Hills NJThe historic Short Hills post office was constructed during the Great Depression with Treasury Department funds. The building, which was completed in 1939, is still in service. The building had housed an example of New Deal artwork, since destroyed.
- Post Office - Sigourney IAThe post office in Sigourney was completed in 1938 with funds provided by the Treasury Department. It is also the site of Richard Olsen's 1940 mural, "Indian Harvest," painted with funds provided by the Treasury Section of Fine Arts and viewable in the lobby.
- Post Office - Siler City NCThis 1940 post office, constructed with funds from the federal government, is home to Maxwell B. Starr's 1942 mural, "Building the First House at Siler's Crossroads," paid for by the Treasury Section of Fine Arts and available for view in the lobby.
- Post Office - Silver Creek NYThe historic post office in Silver Creek, New York was constructed as a federal Public Works Administration (PWA) project with Treasury Department funds. The building, which was constructed in 1935, is still in use today. "Federal Public Works Project #302."
- Post Office - Smithfield VASmithfield's historic post office was constructed with federal Treasury Department funds in 1941. The building, which is still in service, also houses a New Deal mural by William Abbot Cheever entitled "Captain John Smith Trading with the Indians."
- Post Office - Smithville TXThe historic post office in Smithville, Texas was constructed in 1937 with federal Treasury Department funds. The building, which houses an example of New Deal artwork, is still in use today.
- Post Office - Somerset PAThe Somerset, Pennsylvania Post Office was constructed in 1936 with Treasury Department funds.
- Post Office - South Hadley MAThe post office in South Hadley, Massachusetts was constructed with federal Treasury Department funds. The building, which opened for business in 1935, is still in use today. A New Deal-funded tempera mural titled "Composite View of South Hadley" hangs in the lobby. It was painted by Saul Levine in 1942.
- Post Office - South Orange NJThe post office in South Orange, New Jersey was constructed with federal funds. The building, which was constructed between 1936 and 1938, is still in use today.
- Post Office - South Pasadena CAThis New Deal post office was built by the Treasury in 1935.
- Post Office - South Portland MEBuilt in 1937.
- Post Office - South River NJThe South River, New Jersey post office was constructed with federal funds between 1940 and 1942. It is still in use today.
- Post Office - Southern Pines NCThe Southern Pines post office was completed during the Depression with funds provided by the federal government. It is also the site of Joseph Presser's mural, "Southern Pines Idyll," painted in 1943 for the Treasury Section of Fine Arts.
- Post Office - Southington CTConstructed in 1940, this New Deal post office is also the site of Ann Hunt Spence's 1942 mural, "Romance of Southington," painted under the Treasury Section of Fine Arts.
- Post Office - Spencer INThe historic post office building in Spencer, Indiana was constructed with New Deal funds in 1938. It is still in use today.
- Post Office - Spencer WVThe post office in Spencer was constructed in 1936 with funds provided by the Treasury Department. It is also the site of Vicken von Post Totten's 1938 Plaster of Paris relief, entitled "Pastoral of Spencer," and completed with funds provided by the Treasury Section of Fine Arts.
- Post Office - Spring Valley NY"In 1931, Congress authorized 136 new post offices and extensions to existing ones in New York as part of an amendment to the Public Buildings Act it had passed five years earlier. The construction was meant to offer relief with the worsening of the Great Depression. Spring Valley's would not begin construction for another five years, in 1936. The site was purchased from a local lumber company that year. Construction began later that year, and the building opened in 1937. Its Colonial Revival design, by Treasury Department Supervising Architect Louis A. Simon, is unique to Spring Valley among the many Colonial...
- Post Office - Springerville AZ“The Springerville Post Office is simple in its appearance. Yet it also displays an eclectic collection of architectural design styles. The flat roof with parapets and six water spouts are characteristic of Pueblo Revival. The arched windows suggest Mission Revival influence and the twisted columns and lantern at the entry way arise from Spanish Baroque architecture. Funded by the Public Works Administration and constructed in 1937, the building was designed to house multiple government agencies including the U.S. Forest Service."
- Post Office - Springfield KYThe Springfield post office was constructed in 1939 with the federal Treasury Department funds. It is also the site of three limestone sculptures by Richard Davis: "Wood Chopper," "Kentucky Pioneer," and "Signing of the Marriage Contract of Thomas Lincoln and Nancy Hanks," completed in 1941 for the Treasury Section of Fine Arts.