Gilbert Stanley Underwood (1890–1960) was an American architect best known for his National Park lodges. Born in 1890, Underwood received his B.A. from Yale in 1920 and a M.A. from Harvard in 1923. After opening an office in Los Angeles that year, he became associated with Daniel Ray Hull of the National Park Service. This led to a commission with the Utah Parks Company of the Union Pacific Railroad which was developing the parks in hopes of producing destinations for travelers. During this time Underwood designed lodges for Cedar Breaks National Monument (now demolished), Zion National Park, Bryce Canyon National Park, and the North Rim of the Grand Canyon National Park. His surviving Utah Parks Company buildings are considered exceptional examples of the Rustic style of architecture, and are all listed on the National Register of Historic Places. In addition, Underwood was contracted to design Yosemite National Park's The Ahwahnee, also on the National Register and probably his greatest triumph in the Rustic style.