The Frank de Caro and Rosan A. Jordan Papers are organized into six series: Biographical, Rosan A. Jordan files, Publications, Professional Activities, Correspondence, and Visual Materials. The organization of this collection retains the original organization as the records were received by the donors.

The Biographical series (1939-1995) is arranged chronologically and contains papers specifically relating to de Caro and Jordan's life (diplomas, undergraduate notes, etc.) and papers about relatives such as genealogical research. This series contains several military documents about de Caro's father, who died during World War II. These documents include a certificate (signed by President Truman) showing that de Caro's father was awarded the Purple Heart.

The Rosan A. Jordan series (1958-2000) is arranged into two series. The Education and Reearch subseries (1958-1989) includes syllabi and notes for courses in folklore theory and organizations that Jordan took, as well as correspondence, photographs, transcriptions, and other research materials relating to her dissertation. The Rosan A. Jordan Teaching files series (1973-2000) is ordered chronologically. In addition to handwritten notes, this series contains printouts, as well as magazine and newspaper clippings on a variety of folklore-related topics taught by Jordan during her time at Louisiana State University. Some of the subjects contained within these files include: gender studies; festivals and holidays such as Easter and Days of the Dead; witches and vampires; and excerpts from Isaac Asimov and Alice Walker.

The Publications and Research series (1984-2014) is further divided into seven subseries: Stories of our Lives (1984-2013), Resituating Folklore (1998-2005), Anthology of American Folktales and Legends (2002-2008), Folklore MUSE (2005-2012), and Folklore Recycled (2008-2014). Each of these subseries are arranged by date to show the development of the published works. A subseries titled Frank de Caro Research (1959-1996, undated) is also present. This subseries is ordered chronologically and includes lecture notes taken by de Caro, and research on American murder ballads. A General Research subseries (1988-1994) is also present. This subseries contains reading lists and bibliographies, as well as matireals for other works such as Folk Life in Louisiana, Southern Folklore, and The Folktale Cat.

The Professional Activities Series (1976-1998) is ordered chronologically and contains material pertaining to conferences and events attended by de Caro and Jordan such as the 1990 Cultural Conservation Conference and annual meeting of the American Folklore Society from 1996-1998. Also included in this series are the ephemera from other folklorists.

The Correspondence series (1949-2005) contains four subseries: Frank de Caro Family Correspondence (1949-1985) which includes all manner of correspondence sent and received by Frank de Caro's relatives. The Selected Professional Correspondence (1969-1979) contains copies of de Caro and Jordan's business correspondence. The subseries Selected Letters of Frank de Caro and Rosan Augusta Jordan (1976-1997) contains the correspondence exchanged between de Caro and Jordan. The final subseries, Correspondence to/from Folklorists (1979-1997) contains all the correspondence between de Caro, Jordan, and fellow folklorists. This subseries is arranged chronologically and subsequently alphabetized by the last name of the correspondent.

The Visual Materials series (1943-1974, undated) is further organized into three subseries: Photographs, Postcards, and Slides. The Photograph subseries contains images that relate to folklore topics studied by de Caro and Jordan such as Jordan's research on the Days of the Dead. This collection also contains personal photographs of family members and life events. This series also contains a large collection of postcards from their various travels. Some postcards are merely souvenirs, while it is clear that others were actually used for communication. These postcards come from a several states such as Louisiana, Mississippi, Texas, and various areas of the southwestern United States. The images on these postcards display not only photographs of the related areas, but also paintings, folklore of native animals such as the mythical jackalope – a creature of myth that looks like a jackrabbit with antelope horns. There are also postcards with jokes and comedic images on them. This subseries may be of interest for regional folklore studies. This series retains the order that it was in at the time of acquisition.