The early Las Vegas, Nevada photographs depict the development and growth of Las Vegas, Nevada from approximately 1900 to 1961. The photographs depict the Stewart Ranch (also known as the Las Vegas Ranch), the Mormon Fort, the Las Vegas Townsite Auction of 1905, Fremont Street, the Union Pacific Railroad depot, the San Pedro, Los Angeles and Salt Lake Railroad depot, and significant buildings. The items described include black-and-white photographic prints, postcards, and negatives; items listed are photographic prints unless otherwise specified. Numbered items inside oversized boxes are photographs within scrapbooks and have been digitized.

The Hoover Dam and Colorado River photographs depict the Hoover (Boulder) Dam and the Colorado River from 1925 to 1960. The photographs primarily depict the Hoover Dam following its completion in 1935, but also show the dam'’s construction and location in Black Canyon on the Colorado River. The photographs also depict Lake Mead, the reservoir created by the Hoover Dam, as well as Boulder Canyon. The items described include black-and-white photographic prints, postcards, and negatives; items listed are photographic prints unless otherwise specified.