Guichard Parris papers consist of correspondence, diaries, manuscripts, notes and printed material from his personal files, his files on the history of the National Urban League, manuscript material for Blacks in the City; A History of the National Urban League, Boston, Little, Brown, 1971 (co-authored with Lester Brooks) and administrative files of the National Urban League. Parris' personal files include folders on his organizational affiliations outside the National Urban League; of particular interest are copies of his correspondence with Mary McLeod Bethune while he was affiliated with the National Youth Administration. Bethune is among the cataloged correspondence, as are Theodore Roosevelt and Ruth Standish Baldwin.

There are substantial gaps for the years 1921-1939.