Collection
- Almon Underwood journal, 1832-1859 (majority within 1832-1850)1
- Almon Wheeler memorandum of travels, 18271
- Alvah S. Hopkins papers, 1894-1951 (majority within 1894-1895)1
- Amanda Easterday diary, 1869-1876 (majority within 1869)1
- Amos A. Moore papers, 1862-1865 (with gaps)1
- Amzi and Lizzie Jones journal and account book, 1863-1893 (majority within 1867-1881)1
- Andrea Lael Cappaert Papers, 1952-19801
- Andrew Babicki collection, 1916-19361
- Andrew Cunningham McLaughlin papers, 1881-19471
- Andrew Robinson Giddinge diary, 18351
- Ann M. Brackett journals, 1863-18871
- Ann M. Van Wart journals, 1832-1837 (majority within 1832-1835)1
- Ann Price Gibson Paschall diaries, 1820-18551
- Anne Waldman Papers, 1945-2012 (majority within 1965-2000)1
- Anonymous diary [attributed to Sarah Ruckman], 1859-18601
- Anonymous woman's diary, 19151
- Anson De Puy Van Buren papers, 1846-18851
- Anthony Wayne family papers, 1681-19131
- Anton Russell papers, 1918-19191
- Appleton-Aiken family papers, 1806-19341