US Post Office-Christiansburg is a historic post office building located at Christiansburg, Montgomery County, Virginia. It was designed and built in 1936, and was designed by the Office of the Supervising Architect of the Treasury Department under Louis A. Simon. The one-story, five-bay, brick building is in the Colonial Revival style. It features a denticulated cornice and a standing-seam metal, gabled roof surmounted by a small, flat-roofed cupola. The interior features a Works Progress Administration sponsored mural by Paul DeTroot, depicting local events of the French and Indian and Revolutionary wars.
It was listed on the National Register of Historic Places in 1989. It is located in the Christiansburg Downtown Historic District.