The Ted Curtis Smythe papers (1830-2008) contains articles, notes, course materials, organization information, and journalism materials. Smythe is Professor Emeritus of Communications at California State University, Fullerton. He is co-editor of "Readings in mass communication" and numerous scholarly articles in journalism history.

The Southern Utah Wilderness Alliance records (1969-2000) is a collection of office files, correspondence, and legal materials related to both the day-to-day operation of the organization as well as grassroots, political, and legal campaigns undertaken for or against specific actions affecting Southern Utah Wilderness areas.

The Lonnie Sparks papers (1990-1991) consist of correspondence and an article regarding the interpretation of the Pearl of Great Price. A few other items are also included with the collection.

The Hillary W. St. Clair papers (1896-1997) contain some of St. Clair's published research, calculations, notes and workbooks during his time with the Bureau of Mines, and other research in the field of metals and mining. Materials of particular interest include St. Clair's notes and lecture material regarding the history of American mining. This was later published by the Bureau of Mines in a book called Mineral Industry in Early America.

The Joseph Standing collection (1879) contain six newspaper accounts of his murder during an LDS mission to Georgia.

The Page Stegner papers (1969-2001) consist of manuscript drafts, finished manuscripts, galleys, published essays, interviews, correspondence, and news articles. This collection also contains drafts through page proofs of Marking the Sparrow's Fall: Wallace Stegner's American West, with an introduction written by Page Stegner.

The Stanley Smith ("Smitty") Stevens papers (1934-1981) contain biographical information, articles, and other publications. He went on a mission for the Church of Jesus Christ of Latter-day Saints (LDS Church) from 1925-1928 to Belgium and Switzerland. Stevens received a Ph.D. in 1933 from Harvard University. He later became a professor and the director of the psychophysics laboratory at Harvard University.

The Stevenson family papers (1908-1994) contains poetry and a newspaper article by members of the Stevenson family, a genealogy, and an article published in the Carbon County News in 1908 concerning Clarence Henry Stevenson and the Independent Coal and Coke Company of Kenilworth, Utah.

The Omer Call Stewart papers (1925-1989) consist mainly of personal items and published articles. Correspondence, news clippings, diaries, book reviews, articles, and student papers are included. Omer Call Stewart (1908-1991) was an an anthropologist from Utah who spent most of his professional career at the University of Colorado.

The Mark Stiegemeier papers (1973-1986) contain a scrapbook, magazine articles, and news clippings concerning his involvement in freestyle skiing. Stiegemeier was a freestyle skier during the 1970s and 1980s.

The James D. Still Mormon history collection (1834-2010) contains articles, clippings, correspondence, an index, and other research materials on Mormon history, particularly Oliver Cowdery, the writing of the Book of Mormon and the Book of Abraham, and the relationship between Masonry and the LDS Church.

The Thomas G. Stockham papers (1951-1994) provide information about the personal and professional life of Thomas Greenway Stockham, Jr. (b. 1933). The papers include personal documents, correspondence, teaching and business records, scientific and technical reports and manuals, project notes, and published and unpublished documents. Stockham is best known for his development of digital sound, his contributions to computer image processing procedures, and his work on the Watergate tapes.

The Marvin H. Strong papers (1918-1985) contain biographical and genealogical information, correspondence, music scores, and newspaper articles. Marvin H. Strong was a Utah musician and teacher. He taught music in several Utah high schools and directed several youth and senior bands.

The Jim Sullivan papers (1972-1993, 2008-2014) include correspondence from Jim Sullivan, a pamphlet illustrating the Snow King Resort, sticker, Teton magazines, Jackson Hole Historical Society and Museum Chronicle newsletter, and Jackson Hole Skier containing articles about Snow King. Included in the collection is an article written about Sullivan.

The Joseph P. Surace papers (1831-2002) are comprised of periodical articles, newspaper clippings, book reviews, proceedings of masonic grand lodges and masonic society publications. The collection focuses upon the history of Freemasonry in the United States, Canada and several European countries.

This collection consists of the oral history of Sweeney (b. 1838), narrated to J. Ross Mackenzie in the early part of the twentieth century. Sweeney was a soldier, gold miner, freight runner, and finally a farmer.

The J. Irvin Swigart papers (1918-1981) consist of reprints of articles, scrapbooks, photos, notes, and some correspondence from years as professor of physics at the University of Utah, 1931-1978.