- Abner Johnson Leavenworth Papers, 1825/18611
- Adams Papers, 1782/18901
- Alabama Collection, 1823/18931
- Alexander Brown Papers (I), 1815/19101
- Alexander Brown Papers (II), 1748/19001
- Alexander Haight family collection, 1764/19761
- Alfred Leyburn Papers, 1823/1899, bulk 1830/18391
- Ambler Papers, 1806/18361
- Amos Koontz Papers I, 1809/1965, bulk 1936/19651
- Anderson Family papers, 1755/19581
- Ann Smith Academy Papers, 1807/19101
- Archibald Woods Papers, 1777/1846, bulk 1783/18461
- Armistead Boothe Papers (MS164), 1803/19901
- Armistead-Cocke Papers, 1680/19171
- Austin-Twyman Papers, 1765/19391