Collection
- Office of the President -- Mr. Frank T. Brogan, 2003-2009, bulk 2003-20041
- Olga Hanlon family collection, 1940-20141
- Oliver Luther Austin Collection, 1945-2013, Date accessioned: 2013-11-13, bulk 1945-19521
- Orlando Gay Chorus collection, 1990-20181
- Orlando Shakespeare Theater Collection, 1974-2013, bulk 1986-20091
- Otis R. Anthony collection, 1977-2009, 2008-11, bulk 1977-19791
- Paul and Leonard Gordy collection, 1946-2012, Date acquired: 07/23/2015, Date accessioned: 2020-06-081
- Peter Belmont Preserve the 'Burg Collection, bulk 1980-20201
- Philip Sperling collection, 1942-1946, Date acquired: 2017-06-29, Date accessioned: 2017-07-111
- Phillip Spurgeon Collection, 1972-20201
- President William C. Merwin, 1999-20071
- Raymond L. Williams collection, 1945-2020, Date accessioned: 2020-01-211
- Richard and Les Pride collection of monographs, bulk 1980-20161
- Rob Boyte Collection, bulk date unknown1
- Robert & Ingrid MacDonald Collectoon, 1970-20101
- Robert G. Grimes Papers, 1976-20091
- Robert H. Dodd papers, 1936-2009, bulk 1941-19451
- Robert L. Glasser Collection, 1956-20161
- Robin Ronne papers, 1999-2010, Acquired1
- Rowland G. Bush collection, 1944-1948, Date acquired: 07/05/2009, Date accessioned: 2020-04-21, bulk 1944-19451