The Crater Historic District encompasses National Park Service structures within Haleakala National Park. The buildings include utility structures, employee housing, administration facilities and visitor services facilities. Most were built by the Civilian Conservation Corps to standard Park Service designs in the 1930s. A few World War II era buildings survive from U.S. Army construction, and are included in the historic district. The Crater Historic District was added to the National Register of Historic Places on November 1, 1974.