- CDOB : David J. O'Brien: Manuscripts
- CDOB #1990-139 Accession : David J. O'Brien Papers, 10 linear feet 1970s-1980s
9 boxes of files regarding Call to Action (1976) conference or meetings; research, essays and manuscripts by others; grants; teaching; workshops; writings.
- CDOB #1997-203 Accession : David J. O'Brien Papers, 8.75 linear feet 1991-1996
Drafts of Isaac Hecker: an American Catholic and of From the Heart of the American Church ; miscellaneous files representing O'Brien's activities outside of the College of Holy Cross
- CDOB #2003-179 Accession : David J. O'Brien Papers, 5 linear feet
Stonehill College Files and Miscellaneous Files, 1996-1999.
- CDOB #2007-021 Accession : David J. O'Brien Papers, 1.25 linear feet 1994-2005
Correspondence, memoranda, and documentation of his activities
- CDOB #2007-182 Accession : David J. O'Brien Papers, 4 linear feet
Files from his research and writing; files reflecting liberal Catholic concerns; files on Catholic colleges and universities; notecards, including notes on Isaac Hecker and Orestes Brownson.
- CDOB #2009-379 Accession : David J. O'Brien Papers, 3 linear feet
Files on organizations including ACCU and VOTF; files on people including Dorothy Day and Bp. Thomas Gumbleton; files on Catholic studies and contemporary Catholic culture; talks; and letters.
- CDOB #2009-385 Accession : David J. O'Brien Papers, 1 linear foot
Correspondence 1998-2008.
- CDOB #2009-386 Accession : David J. O'Brien Papers, 6 linear inches
Files on Jesuits, Jesuit Studies, Jesuit Higher Education; the Association of Catholic Colleges and Universities (ACCU); James Carroll (clippings of his writings); & John Deedy (correspondence regarding O'Brien's essay on Catholic Youth, 1999).
- CDOB #2013-182 Accession : David J. O'Brien Papers, 4.5 linear feet
Documents representing his academic and social-action interests, including files of talks, some correspondence, and topical files, dating chiefly from the second half of the twentieth century.
- CDOB #2013-189 Accession : David J. O'Brien Papers, 7 linear inches
Subject files, trip files, and files representing research and writing, including work on his book on Catholic social teaching: adding to material from 2013-182 (filed in last box of that accession).
- CDOB #2015-228 Accession : David J. O'Brien Papers, 5 linear inches 1965-2014
Papers representing his career as a scholar, writer, and active Catholic layman: with a series of named files; a series of chronological scrapbook binders containing his articles, reviews, and speeches; and a series of appointment books.
- CDOB #2017-227 Accession : David J. O'Brien Papers, 1 linear foot 2007-2017
- CDOB #2017-227: 1/01 Folder : St. Joseph Central High School 2016-2017
- CDOB #2017-227: 1/02 Folder : Andrew Bacevich 2016-2017
- CDOB #2017-227: 1/03 Folder : Elms Papers and Correspondence 2012-2017
- CDOB #2017-227: 1/04 Folder : Ed Cottier 2012-2015
- CDOB #2017-227: 1/05 Folder : Bill Portier 2015
- CDOB #2017-227: 1/06 Folder : Elms - Cindy Lyons 2011-2014
- CDOB #2017-227: 1/07 Folder : Elms Correspondence 2007-2014
- CDOB #2017-227: 1/08 Folder : William Lynch Book 2015-2016
- CDOB #2017-227: 1/09 Folder : Dan Martin's Thesis 2015
- CDOB #2017-227: 1/10 Folder : Mark Massa - Oxford University Press 2016
- CDOB #2017-227: 1/11 Folder : Bobby Kennedy 2016
- CDOB #2017-227: 1/12 Folder : Thomas Shannon 2015
- CDOB #2017-227: 1/13 Folder : Mount Carmel - Martin Luther King 2016-2017
- CDOB #2017-227: 1/14 Folder : Letters 2013-2017
- DDOB : David J. O'Brien: Digital Data
- DDOB #2013-182 Accession : David J. O'Brien Digital Data, 1.8 Mb 1980-2013
Letters.
- DDOB #2017-227 Accession : 14 disks (both CDs and DVDs).
- ADOB : David J. O'Brien : Audio-Visual Material
- ADOB 22738-22754 Group : Voice of the Faithful [VOTF] Conference, Boston [5 vhs tapes and 12 audio tapes] 2002/07
- ADOB 22738 VH : Voice of the Faithful Conference: Awakening Laity with Thorp, Cahill, Cardman, Pope, Arens, Post, Baier [02VFV2] 2002/07
- ADOB 22739 VH : Voice of the Faithful Conference: Shaping the Future Church? with Fraser, Beaudoin, Dillin, Swidler, O'Brien [02VFV3] 2002/07
- ADOB 22740 VH : Voice of the Faithful Conference: Changing the Church? with Bane, de Alderete, O'Neill, Carroll [02VFV04] 2002/07
- ADOB 22741 VH : Voice of the Faithful Conference: Panel Action and Summary with Jim Post, Fr. Bill Kremmell, Mass Homily [02VFV05] 2002/07
- ADOB 22742 VH : Voice of the Faithful Conference: First Response in the Parish, Listening Techniques with Mike Sweatt and William Cadigan [02VFV09] 2002/07
- ADOB 22743 CT : Voice of the Faithful Conference: First Response in the Parish, Listening Techniques with Mike Sweatt and William Cadigan [02VF09] 2002/07
- ADOB 22744 CT : Voice of the Faithful Conference: Establishing a Parish Voice Affiliate with Keyes, Mott, Nauman, Sullivan [02VF10] 2002/07
- ADOB 22745 CT : Voice of the Faithful Conference: Creating a Sexually Safe Parish - Debra Haffner [02VF11] 2002/07
- ADOB 22746 CT : Voice of the Faithful Conference: Protecting Our Children - Jetta Bernier and Tim Nichols [02VF12] 2002/07
- ADOB 22747 CT : Voice of the Faithful Conference: Victim to Survivor: Healing for Life - N. Brook, M. Serrano, Fr. Hayes [02VF13] 2002/07
- ADOB 22748 CT : Voice of the Faithful Conference: The Dilemma of Priests - Fr. Lynch, Fr. Bullock, S. Fraser [02VF14] 2002/07
- ADOB 22749 CT : Voice of the Faithful Conference: Renewing and Restructuring the Church - Anthony Massimini [02FV15] 2002/07
- ADOB 22750 CT : Voice of the Faithful Conference: Setting Up A Parish / Diocesan Constitution - Leonard Swidler [02VF16] 2002/07
- ADOB 22751 CT : Voice of the Faithful Conference: Young Adults: Claiming Our Catholic Church - John Morse and Jacqueline Landry [02VF17] 2002/07
- ADOB 22752 CT : Voice of the Faithful Conference: Our Financial Voice: Money Matters - Steven Kreuger and James Post [02VF18] 2002/07
- ADOB 22753 CT : Voice of the Faithful Conference: Lay Participation in Governance - F. Cardman, T. Doyle, S. Pope [02VF19] 2002/07
- ADOB 22754 CT : Voice of the Faithful Conference: Keeping Your Children Safe - Linda Pieczynski [02VF20] 2002/07