The Calumet Mining and Refining Company records (1927-1980s) contain information about several mining plants throughout Utah and Nevada. It also has information about mined materials and mining methods. Many of the materials also pertain to the Combined Metals Reduction Company.

The Ray R. Canning family papers (1892-2004) are a collection of correspondence, pictures, personal emphemera, and reminiscences gathered by Ray and his wife Lois Cook Canning.

The Paul B. Cannon papers (1852-1989) contain correspondence, a scrapbook, articles, and news clippings. Cannon was an attorney in Salt Lake City, Utah.

The Capitol Reef National Park records (1880-1999) consist of photocopies of material collected by Park Service employees at Capitol Reef National Park, and include correspondence, reports, articles, news clippings, notes, maps, biographies, and autobiographies relating to the establishment of Capitol Reef National Park and the development of the surrounding landscape.

The Brigham Young Card papers (1936-2003) consist of a photocopy of a typewritten diary relating to Card's mission for the LDS Church. He was called to the French mission and was assigned to work in the French-Swiss (Romande) District of Switzerland. Also included in the collection is Card's Boy Scout journal and general articles and historical information.

The Thomas R. Carlson papers (1909-1997) consists of correspondence, notebooks, reports, essays, and articles written or collected by Thomas Carlson on topics in mining engineering. Carlson is a mining engineer who spent most of his career working in various capacities for the Kennecott Copper Corp.

The Kate B. Carter article (1934) is entitled, "Trees of Utah" and presents a brief history of native trees and those planted by pioneers.

The Ralph Vary Chamberlin papers (1890-1969) contain correspondence, articles, essays, research and biographical materials, class records, and news clippings. Chamberlin was a biology professor at the University of Utah and wrote the centennial history of the university.

The Harold T. Christensen papers (1933-1998) consist of sections of his memoir titled Mormon or Sociologist: Memoirs of a Marginal Man; articles, primarily on sociology; biographical materials; masters thesis (1937); autobiography of his brother, Cornell Christensen; and other materials. Christensen was a professor of sociology at Brigham Young University and at Purdue University.

The Cochranism collection (circa 1816-1983) consists of photocopied primary and secondary sources on the life of Jacob Cochran and the sect which he founded, including photocopies of legal documents. Also included is correspondence to various libraries and institutions seeking information on Jacob Cochran and Cochranism, particularly on whether any members of the Cochran sect later joined the LDS Church.

The cold fusion collection (1987-1992) contains articles written by Bruce V. Lewenstein relating to the history and testing of cold fusion and clippings from the Utah Chemistry Department relating to the study of cold fusion.

The Everett L. Cooley papers (1775-2006) consist of autobiographical information, articles, book reviews, papers, correspondence, manuscripts, documents, oral history materials, speeches, meeting minutes, recommendations, memos, newsletters, bulletins, programs, and newspaper clippings. Cooley is professor emeritus of history at the University of Utah and the retired director of special collections in the University of Utah Marriott Library.

The Ramiro Cortés papers (1933-1988) document the personal and professional life of the first significant Mexican-American composer, Ramiro Cortés (1933-1984), of serious twentieth-century music in the United States.

The Walter Pace Cottam papers (1929-1988) contain biographical and commemorative articles and speeches about Walter Cottam. Also included are photocopies of three speeches given by Cottam primarily dealing with beautification and conservation of Utah natural resources, correspondence, a notebook, and research information. Cottam was a professor of botany at the University of Utah, 1931-1962.

The Patrick G. Coy papers (1988-1997) contains a curriculum vitae and an article by Coy, "The One-Person Revolution of Ammon Hennacy." Patrick G. Coy was a professor at Kent State University and an author.

The Arthur L. Crawford papers (1899-1980s) contain personal and professional correspondence, manuscripts and articles pertaining to mineral resources in Utah, bound volumes on geology and flood problems, Western Gilsonite and Elaterite Co. financial records, Utah Geological and Mineralogical Survey (UGMS) administrative records, and the missionary journals of Crawford's father.