- 6th Battery of Binghamton, N.Y. Veterans minute book, 1871/19112
- A. H. Hand Papers, 1835/20092
- A. K. Leake Papers, 1872/19403
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19663
- A.J. Lawrence Account Book, 1857/18832
- Abbie Louisa Hill Scrapbook, 1874/18842
- Abolitionist Movement Collection, 1834/18881
- Abraham Rudisill diary, 1875/18862
- Accounts, 19th Century, 1836/18971
- Adam Empie Papers, 1811/2004, bulk 1811/18503
- Adams Papers, 1782/18902
- African American Stereoview Collection, 1860/19011
- Alabama Collection, 1823/18932
- Albert C. Swindler Papers, 1862/1929, bulk 1862/18642
- Alexander Brown Papers (I), 1815/191012