Collection
- Office of Alumni Engagement records1
- Office of the Bursar Records8
- Office of the President Timothy J. Sullivan records1
- Office of the President. James Blair Records1
- Office of the President. James Madison Records2
- Ohio County (W. Va.) Court Records and Miscellaneous Papers61
- Ohio Historical Papers1
- Ollen Lawrence Burnette, Jr. papers2
- Ollinger Crenshaw Papers2
- Orum, Eskey, and McCaffery Family Papers1
- Oscar Doane Lambert, Historian, Papers regarding Historical Research1
- Oscar Shewmake Autograph Collection2
- Overton family papers11