Boulder City Historic District, Historic district in Boulder City, United States.

Boulder City Historic District holds 514 buildings listed on the National Register of Historic Places, Nevada's largest such listing. Of these, 408 were built between 1931 and 1942, 66 between World War II and 1950, and 40 after 1950. The town was laid out by the U.S. Bureau of Reclamation and Six Companies, with Saco Rienk DeBoer as chief planner, and its centre is unified by Spanish Colonial Revival architecture.

The federal government established Boulder City in the 1930s to house workers and managers during Hoover Dam construction. The district was designed as a planned community to quickly accommodate a growing workforce.

The name Boulder City comes from Boulder Canyon, the original site considered for the dam before it was moved to Black Canyon. The commercial buildings on Nevada Way went up under permits issued by city manager Sims Ely from 1931, and the view north toward the Bureau of Reclamation Building on the hill looked much as it does today by 1932.

The district is walkable and easy to explore on foot to view buildings and find your way around. An interactive map viewer lets visitors search addresses to learn about construction dates and architectural details of specific structures.

The area remained under federal control for nearly 30 years before becoming an independent city in 1959. This unusual arrangement shaped how the place developed and was managed differently from typical American towns.