Old Headquarters Area Historic District, Historic district in Wyoming, United States.

The Old Headquarters Area Historic District at Devils Tower National Monument holds three National Park Service rustic buildings: the old headquarters building (1935), the custodian's house (1931) and the fire hose house (1937). The headquarters, built by the Civilian Conservation Corps, now serves as the monument's visitor center, with restrooms, museum storage and a library on its lower level.

The custodian's residence was built in 1931 by contractor Mr. Cummings of Deadwood, South Dakota, from designs by the NPS Landscape Division under Thomas Chalmers Vint, and first housed the monument's second custodian, George C. Crowe. The Civilian Conservation Corps built the administration building in 1935 as an Emergency Conservation Works project; it served as headquarters and museum until 1959, then as the visitor center. CCC Camp NM-1, 6th Period, finished the fire hose house by August 10, 1937.

The fire hose house, designed by Edward A. Nickel of the NPS Branch of Plans and Design, was built by Civilian Conservation Corps Camp NM-1, 6th Period, as ECW Project #17, finished by August 10, 1937, "except for shelves" per a handwritten note on the plans. It housed the fire hydrant and the monument's hose and firefighting gear, a use it has kept since 1937.

The district is accessible through marked paths and visitors can explore it at their own pace. It works well for self-guided walking and viewing the structures from different angles.

The fire hose house was finished on 10 August 1937, and the handwritten note on Edward A. Nickel's plans records the work as complete "except for shelves." It has stored the monument's hose and firefighting equipment since then.