Hubert Work was a U.S. administrator and physician. He served as the United States Postmaster General from 1922 until 1923 during the presidency of Warren G. Harding. He served as the United States Secretary of the Interior from 1923 until 1928 during the administrations of Warren G. Harding and Calvin Coolidge.

The United States secretary of the interior is the head of the United States Department of the Interior. The secretary and the Department of the Interior are responsible for the management and conservation of most federal land along with natural resources, leading such agencies as the Bureau of Land Management, the United States Geological Survey, Bureau of Indian Affairs and the National Park Service. The secretary also serves on and appoints the private citizens on the National Park Foundation Board. The secretary is a member of the United States Cabinet and reports to the president of the United States. The function of the U.S. Department of the Interior is different from that of the interior minister designated in many other countries.