The First Unitarian Church of Salt Lake City records (1891-2010) is a rich collection of source materials, containing primarily original documents tracing the history and activities of the Unitarian Church in Salt Lake City. It is organized into 221 boxes of records dating from its founding in l89l up to 2010. The Unitarian Church has been an advocate of many causes and has played a vital cultural role in the Salt Lake City area.

The Verna Roberts Jorgensen papers (1930-1982) contain documents collected by Jorgensen from the 1940s-1960s as the unofficial historian for the First Unitarian Church of Salt Lake City, Utah. Main components of the collection relate to the late Reverend Jacob Trapp.

The Lorille Horne Miller papers (1938-1991) contain correspondence, newsletters, meeting agendas, maps, and pamphlets related to the 1977 National Women's Conference in Houston, Texas. In addition, there are news clippings related to the activities and membership of the First Unitarian Church from 1938-1946.