Mammoth Post Office

Yellowstone’s main post office was one of 1,007 post offices constructed from 1935 to 1938 “with a view to relieving countrywide unemployment.” Using standardized plans developed from guidelines provided by the Treasury Department, these post offices were built in sizes and styles that reflect transitions in architectural design and the context of the communities in which the offices were located. The Yellowstone Post Office is a concrete building with a hipped roof in the French Renaissance Moderne style, compatible with the Art Moderne style ornament on the nearby Mammoth Hot Springs Hotel, which was partially rebuilt in 1936. The post office lobby has walls of travertine from a quarry outside the park’s north entrance.