- Braxton County (W. Va.) Court Records and Miscellaneous Papers, 1830/19535
- Bray Papers, 1730/18174
- Brooke County (W. Va.) Court Records and Miscellaneous Papers, 1780/191813
- Brooks F. McCabe, Collector, Papers, 1770/20191
- Brown Family Papers, Photographs and Maps, 1765/19591
- Brown, Coalter, Tucker Papers (I), 1790/192919
- Brown, Coalter, Tucker Papers (II), 1791/19204
- Bruton Parish Church (Williamsburg, Va.) records, 1662/2010, bulk 1900/20001
- Bryan Family Papers
1770-19184
- Bryan Family Papers, 1780/18252
- Bucktrout-Braithwaite Papers, 1780/1996, bulk 1890/18993
- Burwell-Catlett Papers, 1794/18871
- Bushrod Washington family papers, 1662/183522
- Byer Family Genealogy, 1726/19381
- C. Harrison Mann, Jr. Map Collection, 1579/19611