The J. T. McWilliams Photograph Collection contains photographs and postcards from Nevada and Southern California from approximately 1900 to 1970. The materials include postcards depicting Las Vegas, Nevada casinos such as El Rancho Vegas and the Golden Nugget Gambling Hall. The materials also include postcards depicting towns and scenes in Nevada such as Carson City, Rhyolite, Red Rock Canyon, and covered wagons traveling to Las Vegas. Lastly, the materials contain several photographs of the McWilliams family, possibly while they were living in what is now Las Vegas, Nevada.

The Ed W. Clark Photograph Collection contains photographs that depict politicians and businesspeople in Southern Nevada from 1900 to 1975. The photographs depict several Democratic Party members, including U.S. Senators Pat McCarran and Berkeley Bunker, Nevada Assemblyman Harry Edward "Hap" Hazard, and Nevada Governor Edward P. Carville. The photographs also depict political events, including the planting of a tree in the courthouse park of Las Vegas, Nevada, and a parade on Fremont Street in Las Vegas.