The collection is predominantly composed of Stewart Lee Udall's professional and public papers. Items of the 84th, 85th, and 86th Congresses are organized into administration and legislation files. Administration includes routine office matters, requests, and correspondence relating to particular problems or issues. Legislation encompasses correspondence arranged by subject, related bills, hearings, clippings, speeches, and background materials. Audio-visual materials such as interviews, radio shows and public event; as well as twenty-five photographs of President Kennedy at various public functions are also present.