- BLSA: Black Law Students Association records, 2014/20214
- Barbara H. Dunn Papers, 1970/20033
- Barbara Lustbader New York City playbills collection, 1957/201218
- Barbara McKnight Benham papers, 1966/20212
- Barnette Collection, Lawyer, Businessman, Educator, Philanthropist, and Chairman Emeritus of Bethlehem Steel Corporation, 1905/202010
- Baseball records, 1908/20242
- Ben Benson Collection, 1789/20151
- Benjamin L. Wigfall Artist Archives and Mary Carter Wigfall Personal Papers, 1880/202320
- Berkeley Garden Club records, 1970/19961
- Bernie Peace, Artist, Papers and Artwork, 1960/20131
- Bethlehem Stone Church Records, 1844/20114
- Betsy Brinson collection of AIDS epidemic exhibit materials,
1998, 2016-20172
- Betsy Brinson collection of AIDS epidemic exhibit materials, 1998/20172
- Betsy Brinson collection, 1974/20134
- Betty Brown Clemmer and Willis Clemmer papers, 1920/2015, bulk 1943/19493