- Board of Trustees records, 1774/19667
- Board of Visitors records, 1757/20235
- Boots (Steiffel) and Peterson (Biedert) Families Genealogies, 1771/19851
- Borland Family Papers, 1771/19404
- Bowman Family Papers, 1765/19982
- Bowyer-Hubard Papers
1767-18163
- Boyers Morgan Clark, Compiler, Genealogy Records, 1660/19551
- Bradford Laidley Papers, 1755/19911
- Bradley T. Johnson Papers
1676-19373
- Brady Family Papers, 1750/19801
- Brafferton Estate Collection, 1691/19352
- Brainard Charlton Collection of Colonial and Continental Paper Money, 1775/17802
- Bray Papers, 1730/18174
- Brooks F. McCabe, Collector, Papers, 1770/20191
- Brown Family Papers, Photographs and Maps, 1765/19591