- Amos Koontz Papers II, 1865/19701
- Anatole and Vladimir Kalichevsky Papers, 1871/19551
- Anderson Family papers, 1755/19581
- Andrew C. L. Gatewood papers, 1860/19931
- Anne Lewis Jones Collection (MS010), 1918/19191
- Anne T. Chapman Papers, 1884/19541
- Anson Du Puy Van Buren letters, 1863/19971
- Armistead Boothe Papers (MS164), 1803/19901
- Arthur George Williams Scrapbooks, 1905/19351
- Association for the Preservation of Virginia Antiquities, Colonial Capitol Branch Records, 1896/19891
- Augustus C. Golding Papers, 1859/1934, bulk 1862/18641
- Austin-Twyman Papers, 1765/19391
- Baer Family Papers, 1744/19291
- Baird Family Papers, 1656/1922, bulk 1656/18481
- Barron Family Papers, 1793/19421