The 1988 Seoul Olympics ephemera and printed materials, 1984-1994, comprise promotional ephemera, realia, brochures, catalogs, programs, and publications created and collected by the Seoul Olympic Organizing Committing for the 1988 Seoul Olympic Games, which were held in Seoul, South Korea from September 17 to October 2, 1998. The collection contains primarily ephemera and realia in the form of enamel pins, buttons, keychains, ceramic commemorative plates and tea cups, Hodori the Mascot plastic standing figurines and pottery, stickers, slides, flag and regular banners, posters, medallions, postcards, an Asian fan, a Kellogg's Frosted Flakes cereal box, Olympics commentary earphones, and a paperweight. There are also oversized items, including an Olympic torch (in original box), a countdown clock, and nine posters on foam core.

The collection also contains printed materials published in connection with the 1988 Olympics Games in the form of open and closing ceremony programs, brochures, guides, catalogs, newsletters, press kits, journals, newspapers, clippings books, and an original Invitation to the opening ceremonies. The remainder of the collection comprises printed materials on the 1986 10th Asian Games, the 1984 Los Angeles Olympic Games as well as the subsequent Olympics in Barcelona and Lausanne, and one folder of correspondence between USC's Korean Heritage Library and the Seoul Olympic Organizing Committee regarding the donation of these materials.