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 Indiana. 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 builtImageArchitectNotesUnited States Post Office (Alexandria, Indiana)Alexandria1936United States Post Office (Attica, Indiana)Attica1935Louis A. Simon, Neal A. MelickUnited States Post Office (Aurora, Indiana)Aurora1935Louis A. Simon, Neal A. MelickUnited States Post Office (Batesville, Indiana)Batesville1936– 1937Louis A. SimonUnited States Post Office (Bloomfield, Indiana)Bloomfield1939Louis A. Simon, Neal A. MelickUnited States Post Office (Boonville, Indiana)Boonville1939United States Post Office (Brazil, Indiana)Brazil1911–1913James Knox Taylor and Accompanying photographs.United States Post Office (Cambridge City, Indiana)Cambridge City1940Louis A. Simon, Neal A. MelickUnited States Post Office-Columbus, now Viewpoint BooksColumbus1897Charles Franklin SparrellOld United States Post Office (Columbus, Indiana)Columbus1910James Knox TaylorColumbus Post Office Columbus1970Kevin Roche, John DinkelooUnited States Post Office (Crawfordsville, Indiana)Crawfordsville1940Louis A. SimonUnited States Post Office (Crown Point, Indiana)Crown Point1936Louis A. SimonUnited States Post Office (Culver, Indiana)Culver1936United States Post Office (Danville, Indiana), now Hendricks County Probation Court BuildingDanville1938United States Post Office (Delphi, Indiana)Delphi1936Louis A. Simon, Neal A. MelickUnited States Post Office (Dunkirk, Indiana)Dunkirk1939United States Post Office (Evansville, Indiana)Evansville1876–1879Alfred B. Mullett, James G. Hill, William Appleton Potter and Accompanying photographsU.S. Post Office and Courthouse, now E. Ross Adair Federal Building and United States CourthouseFort Wayne1931–1932Guy Mahurin, Benjamin Morris, James A. WetmoreUnited States Post Office (Fowler, Indiana)Fowler1939–1940Louis A. Simon, Neal A. MelickUnited States Post Office (Franklin, Indiana)Franklin1935Louis A. SimonUnited States Post Office (Gary, Indiana)Gary1906United States Post Office (Gas City, Indiana)Gas City1937Hammond Post Office and Federal Building Hammond1939Louis A. Simon, Neal A. MelickBirch Bayh Federal Building and United States CourthouseIndianapolis1902–1905John Hall Rankin and Thomas KelloggBroad Ripple Station Post Office (Indianapolis)Indianapolis1940–1941Louis A. Simon, Neal A. MelickUnited States Post Office (Jasper, Indiana)Jasper1937United States Post Office (Knightstown, Indiana)Knightstown1936Louis A. Simon, Neal A. MelickUnited States Post Office (Liberty, Indiana)Libertyc. 1937United States Post Office (Ligonier, Indiana)Ligonierc. 1938United States Post Office (Martinsville, Indiana)Martinsville1935United States Post Office (Michigan City, Indiana)Michigan City1909James Knox Taylor and Accompanying photographs.United States Post Office (Middlebury, Indiana)Middlebury1937Louis A. Simon, Neal A. MelickUnited States Post Office (Monticello, Indiana)Monticello1939Louis A. Simon, Neal A. MelickUnited States Post Office (Nappanee, Indiana)Nappanee1935Louis A. Simon, Neal A. MelickUnited States Post Office (North Manchester, Indiana)North Manchester1935Jacob Rickenbaugh HouseOil Township1874unknown.United States Post Office (Pendleton, Indiana)Pendleton1936Louis A. Simon, Neal A. MelickUnited States Post Office (Rensselaer, Indiana)Rensselaer1937United States Post Office (Rockville, Indiana)Rockville1937Louis A. Simon, Neal A. MelickUnited States Post Office (Sheridan, Indiana)Sheridan1939Louis A. Simon, Neal A. MelickUnited States Post Office (Spencer, Indiana)Spencer1938Louis A. Simon, Neal A. MelickTerre Haute Post Office and Federal BuildingTerre Haute1934Miller & YeagerUnited States Post Office (Tipton, Indiana)Tipton1936–1937United States Post Office (Union City, Indiana)Union City1936

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