List of United States post offices in Wyoming

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. However, modern U.S. post offices were generally designed for functionality rather than architectural style.

Following is a list of United States post offices in Wyoming. 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 officeCityDate builtImageArchitectNotesWyoming MercantileAladdin1896Amos RobinsonUnited States Post Office (Basin, Wyoming)Basin1919James A. WetmoreBuffalo Main Post OfficeBuffalo1911James A. WetmoreCasper Federal Building (now Ewing T. Kerr Federal Building and U.S. Courthouse)Casper1932James A. WetmoreUnited States Post Office (Douglas, Wyoming) Douglas1909Oscar WenderothEvanston Main Post OfficeEvanston1905James Knox TaylorGillette Post OfficeGillette1935Louis A. SimonUnited States Post Office–Green RiverGreen River1931James A, Wetmore, Thomas C. HyrumUnited States Post Office (Greybull, Wyoming)Greybull1937Louis A. SimonSussex Post Office and StoreKaycee1914unknownUnited States Post Office (Kemmerer, Wyoming)Kemmerer1934Louis A. SimonUnited States Post Office and Courthouse (Lander, Wyoming)Lander1907James Knox TaylorYellowstone Main Post OfficeMammoth1936Louis A. SimonUnited States Post Office (Newcastle, Wyoming)Newcastle1932James A. WetmoreUnited States Post Office (Powell, Wyoming)Powell1937Louis A. SimonFirst National Bank of Rock RiverRock River1919Southern Wyoming Lumber CompanyThermopolis Main Post OfficeThermopolis1933James A. WetmoreUnited States Post Office (Torrington, Wyoming)Torrington1932James A. Wetmore

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