Former United States Post Office may refer to: Alphabetical by state, then town Former United States Post Office Building (Fairfield, Iowa), listed on the U.S. National Register of Historic Places (NRHP) Former United States Post Office (Belmont, North Carolina), now Belmont City Hall, NRHP-listed Former United States Post Office (Smithfield, North Carolina), NRHP-listed Former United States Post Office (Kaukauna, Wisconsin), NRHP-listed