This collection contains photocopies and original items pertaining to the genealogy of the Couplin family. Information in the collection begins with the life of William L. Couplin, who, for a portion of his life, lived in St. Peter, Minnesota. The collection also contains information on his son, Charles A. Couplin, and his family. Included in the collection are biographical sketches of selected family members, newspaper clippings, census sheets, correspondence, and photographs.