- Alexander Farish Robertson Papers, 1867/193123
- Alexander Haight family collection, 1764/19765
- Alexander Hamilton, Jr. Letters, 1832/18331
- Alexander McNutt Glasgow Family Papers, 1823/19031
- Alexander Sterrett Paxton Papers, 1858/1959, bulk 1861/18651
- Alexander W. Brown Diaries, 1904/19211
- Alexandria History Collection (MS240), 1767/200813
- Alexandria Library Company Records (MS002), 1794/20071
- Alexandria Office of Sheriff Jail Records (MS054), 1891/19481
- Alfred A. Bolton, Papers regarding History of Management and Other Material, 1900/200732
- Alleghany Chapter, National Society of the Daughters of the American Revolution Records, 1890/20222
- Allen Family Papers, 1766/193316
- Allen-Johnson Family Papers, 1838/19471
- Almanac collection, 1850/19091
- Alumni Association Records, 1833/2014, bulk 1950/20054