- Albert R. Gallatin papers, 1795/18281
- Alderman family papers, 1779/19616
- Alexander Brown Papers (I), 1815/19107
- Alexander Brown Papers (II), 1748/19007
- Alexander Haight family collection, 1764/19763
- Alexander Haight family collection, 1764/19775
- Alexander Hamilton, Jr. Letters, 1832/18331
- Alexander Hugh Holmes Stuart Account Books, 1837/18571
- Alexander Hugh Holmes Stuart Copybook, 1851/18521
- Alexander M. Davis Papers, 1850/18922
- Alexander McNutt Glasgow Family Papers, 1823/19036
- Alexandria Gazette Ledgers (MS026), 1833/18663
- Alexandria History Collection (MS240), 1767/200817
- Alexandria Library Company Records (MS002), 1794/20072
- Alexandria Scrapbook Collection (MS003), 1830/18931