Mary E. Switzer Memorial Building

Mary E. Switzer Memorial Building
U.S. National Register of Historic Places
Mary E. Switzer Memorial Building in 2024
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Location	330 C Street, SW
Coordinates	38°53′8″N 77°1′0″W / 38.88556°N 77.01667°W / 38.88556; -77.01667
Area	3 acres (1.2 ha)
Built	1940
Architect	Charles Zeller Klauder; Office of the Supervising Architect
Architectural style	Egyptian Revival
NRHP reference No.	07000638[1]
Added to NRHP	July 6, 2007

The Mary E. Switzer Memorial Building is a federally owned office building located at 330 C Street SW in Washington, D.C. in the United States. The Egyptian Revival structure was originally named the Railroad Retirement Board Building. It was designed by Charles Klauder and Louis A. Simon and completed on September 15, 1940. Although intended for the Railroad Retirement Board, its first occupant was the United States Department of War. By Act of Congress, it was renamed the Mary E. Switzer Memorial Building on October 21, 1972, becoming the first federal building to be named for a woman.

The Switzer Building was added to the National Register of Historic Places on July 6, 2007.