John W. McCormack Post Office and Courthouse

The John W. McCormack Post Office and Courthouse, formerly the United States Post Office, Courthouse, and Federal Building is a historic building at 5 Post Office Square in Boston, Massachusetts. The twenty-two-story, 331-foot (101 m) skyscraper was built between 1931 and 1933 to house federal courts, offices, and post office facilities. The Art Deco and Moderne structure was designed in a collaboration between the Supervising Architect of the United States Treasury Department and the Boston architectural firm of Cram and Ferguson. It occupies a city block bounded by Congress, Devonshire, Water, and Milk Streets, and has over 600,000 square feet (56,000 m²) of floor space. The exterior of the building is faced in granite from a variety of New England sources, as well as Indiana limestone.[2] It was built on the site of the 1885 United States Post Office and Sub-Treasury Building.

United States Post Office, Courthouse, and Federal Building
U.S. National Register of Historic Places
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Location	5 Post Office Square Boston, Massachusetts
Coordinates	42°21′26″N 71°3′25″W
Area	2.2 acres (0.89 ha)
Built	1931–1933
Architectural style	Art Deco
NRHP reference No.	11000160[1]
Added to NRHP	April 8, 2011

The building is named for John W. McCormack, a long-serving Boston Congressman who was Speaker of the House from 1962 to 1971. It was designated a Boston Landmark by the Boston Landmarks Commission in 1998 and listed on the National Register of Historic Places in 2011.[1]