- O'Shaughnessy Family Papers2
- O.W. Riegel Papers574
- Oak Hill Engraving,
18581
- Office of Alumni Engagement records9
- Office of Commonwealth Preparedness,
1989-2009, bulk 2006-20092
- Office of Commonwealth Preparedness,
1999-200636
- Office of Communications and Marketing subject files34
- Office of Community Engagement and Scholarship Records1
- Office of Fraternity and Sorority Life, Office Administrative Files
1990-2005140
- Office of University Relations Records2
- Office of the Attorney General, Human and Natural Division
1979-19893
- Office of the Attorney General, Judicial Affairs Division
1975-19833
- Office of the Attorney General, Virginia Secretary of, Correspondence and Subject files4
- Office of the Governor, Executive
Mansion Director, Records,
1973-199519
- Office of the President records4