Charles McKenny Union was constructed between 1930-31 as a student union. While the building continues to serve a social function it is no longer the primary student union. It houses offices, classrooms, space for special events and meetings.

The Charles McKenny Union records have been arranged into eight series that includes Administration, History and Programs, Building and Renovations, Conferences and Training, Events, Publicity and Outreach, Student Organizations, Visual Materials and finally Memorabilia. Materials within each series are arranged alphabetically by record type and administrative function.

The Administration, History and Programs series documents the administration of the building as a place for special events, meetings, presentations and other special events. Included in this series are the administrative documents collection through the course of typical business, including contract information, employee and volunteer schedules, evaluations, reports and planning documents. The Building and Renovations series contains materials related to the construction and facilities maintenance with a subseries dedicated to documenting Renovations and Expansions of the buildings in the 1960s and 1990s. ; this series includes materials pertaining to the planning, construction, and renovation of the building over the years. Also included in the records are news releases, correspondence, clippings, brochures, and event materials.

The Conferences and Training and Events series are arranged alphabetically by the title of the conferences, training and special events that have taken place in McKenny over the years. Included in the Events series of materials are subseries specific to Logistics and Planning, FUNTRUST, Homecoming, LeaderShape and the Student Leadership Institute. The materials traditionally found in a Publicity and Outreach series can be found in the files of the previous two series, but the files in this series pertain to more general topics related to student support. The Student Organizations series includes some files of specific student groups, as well as general information and forms for student groups. Included in this series are two subseries dedicated to Revoked Organizations and Student Government. They are not complete records of either.

The Visual Materials includes original drawings, photographs, scrapbooks, and slides. This is a comprehensive collection of the McKenny building, but in no ways a compelete collection. Memorabilia includes materials used in the daily activities of the Union including cafateria trays, plates and cups, and bowling pins to name a few.