- A.B. Stickney, Compiler, Genealogical Materials1
- A.C.L. Gatewood Papers1
- Aaron Ruble Civil War Letters1
- Abner Osburn, Physician, Papers1
- Adolphus DeBussey, Soldier, Civil War Letters22
- Adolphus P. Howard Papers2
- Aileen Shafer, Collector, Material regarding African-Americans5
- Alan Clarke Railroad Research Papers2
- Alfred Hughes Stock Certificates and Receipts1
- Alfred T. Pope, Bethany College Student, Autograph Book1
- Allen D. Frankenberry, Soldier, Civil War Diaries and Memoir1
- Allen Family Papers33
- Alpheus Garrison Civil War Records1
- Alston Gordon Dayton Papers2
- Ambrotype Portrait Photograph of Mrs. Josephine Neal Robb in Case1