The Johnny and Ginger Mercer Papers contain manuscripts, photographs, sheet music, recordings, printed materials, and memorabilia documenting the early careers (1920s through about 1931) of both Johnny and Ginger Mercer; their courtship and marriage (1930 and 1931); and Johnny Mercer's career as a songwriter, performer, and businessman as it continued after their marriage; Johnny Mercer's work as a lyricist.

The Ober family lived near Johnny Mercer and his family on Lido Isle (Newport Beach, California) in the 1950s and 1960s. The two families became close friends. The collection contains correspondence, photographs, and other printed and manuscript materials, documenting the long relationship between the families, as well as collected material relating to Johnny Mercer, 1976-2000.