The Helen J. Stewart Photographs depict the Stewart Family from approximately 1860 to 1950. The photographs primarily depict Helen J. Stewart and her children as well as the Stewart Ranch (also know as the Las Vegas Ranch) in Southern Nevada. The photographs include the early Las Vegas, Nevada town site, landscapes of Southern Nevada and the American Southwest, mines and mining camps, railroads and railroad workers, the Las Vegas Fort (also known as the Old Mormon Fort), hotels and early businesses in Las Vegas, Native Americans and Native American artifacts, and postcards.

The Leon Rockwell Photograph Collection (approximately 1850-1979) contains black-and-white photographic prints, negatives, and slides, as well as postcards and tintypes. The images portray the lives of the Rockwell family in southern Nevada, their travels throughout New York and the western United States, and their immediate and extended family members. Also included are images of the volunteer and early firefighters of Las Vegas, Nevada, the Rockwell's family cabin at Mount Charleston, Nevada, and the Rockwell family home in Las Vegas. Portions of the images are from the Rockwell family travels across Nevada, Utah, New Mexico, Arizona, and California and depict historic locations such as Cove Fort, Utah; Rhyolite, Nevada; and Pueblo Grande de Nevada.

The Oran K. Gragson Photographs depict Las Vegas, Nevada mayor and businessperson Oran K. Gragson from 1957 to 1981. The photographs primarily depict Gragson at political events with his wife Bonnie and other politicians such as U.S. senators Howard Cannon and Alan Bible, and Nevada Governor Paul Laxalt. The photographs also depict Gragson at groundbreaking ceremonies, Nellis Air Force Base, Las Vegas hotels and casinos, the mayor’s office, ribbon-cutting ceremonies, and with performers such as Wayne Newton, Sammy Davis Jr., and Lawrence Welk.