- Albert Frederick Wilson papers, 1840/19342
- Albert R. Gallatin papers, 1795/18281
- Alderman family papers, 1779/19615
- Alexander Brown Papers (I), 1815/191011
- Alexander Brown Papers (II), 1748/19007
- Alexander Haight family collection, 1764/19768
- Alexander Haight family collection, 1764/197711
- Alexander Hamilton, Jr. Letters, 1832/18331
- Alexander M. Davis Papers, 1850/18923
- Alexander McNutt Glasgow Family Papers, 1823/19035
- Alexander Sterrett Paxton Papers, 1858/1959, bulk 1861/18652
- Alexander Tedford "Ted" Barclay correspondence, 1861/18646
- Alexandria Gazette Ledgers (MS026), 1833/18663
- Alexandria History Collection (MS240), 1767/200819
- Alexandria Library Company Records (MS002), 1794/20072