The Harrah’s Entertainment, Inc. Photograph Collection contains black-and-white and color photographic prints, negatives, postcards, and slides of William "Bill" Harrah at events in Nevada between approximately 1930 and 1991. Also included are views of Harrah’s Nevada properties including Harrah’s Lake Tahoe Hotel and Casino, Harrah’s Reno Hotel and Casino, and the Holiday Inn Hotel and Casino (that later became Harrah’s Las Vegas Hotel and Casino).

The Harrah’s Entertainment Corporate Archives (dating from 1811 to 2004 with the bulk of the materials dating from 1940 to 2000) contain the promotional and corporate files of Harrah’s Entertainment Inc. and its predecessors, as well as Bill Harrah’s personal papers and card game collection. The materials were compiled and developed as a corporate archive by Harrah's Entertainment, Inc.’s Corporate Communications Department. The collection is primarily comprised of casino and employee periodicals, reports, manuals, promotional files, ephemera, and newspaper articles that document Bill Harrah’s casinos in Reno, Nevada and Lake Tahoe as well as Harrah’s Inc., Holiday Inns, Inc., Holiday Corporation, the Promus Companies, and Harrah’s Entertainment, Inc. Also included are photographs that document the construction of Harrah’s properties, business operations, the people who worked and performed at Harrah’s properties, and Bill Harrah’s automobile collection. The collection also contains Bill Harrah’s collection of playing cards and card games. Also included are photographs of the Harrah family.