- Italian castle archive (GEN MSS 110)139
- Letters to Herbert Van Thal (GEN MSS 464)132
- Jean Toomer papers (JWJ MSS 1)127
- Mabel Dodge Luhan papers (YCAL MSS 196)127
- James Jesse Strang collection (WA MSS 447)121
- Walter O. Evans collection of Frederick Douglass and Douglass Family papers (JWJ MSS 240)119
- American Historical Financial Documents Collection (GEN MSS 1081)118
- Edmund Wilson papers (YCAL MSS 187)115
- Dial/Scofield Thayer papers (YCAL MSS 34)112
- Thornton Wilder papers (YCAL MSS 108)110
- Claude McKay collection (JWJ MSS 27)108
- Mary Butts papers (GEN MSS 487)106
- Western silent films lobby card collection (WA MSS S-2553)105
- William A. Speck collection of Goetheana : manuscripts (YCGL MSS 6)102
- Manuscripts in the Richard Gimbel Collection of Charles Dickens (GEN MSS 1998)101
- Theatre Guild archive (YCAL MSS 436)99
- Tracings of illustrations by William Blake for Dante's Divina Commedia. (GEN MSS 1396)99
- Mathew B. Brady and Levin Corbin Handy Photographic Studios Collection (GEN MSS 580)95
- Walter O. Evans collection of Ollie Harrington artwork (JWJ MSS 236)95
- Spinelli archive (GEN MSS 109)91
Libraries & Collections
- Arts Library
- Bass Library
- Beinecke Library
- Classics Library
- Divinity Library
- Film Study Center
- Fortunoff Archive
- Humanities Collections
- International Collections
- Law Library
- Lewis Walpole Library
- Library Collection Services
- Manuscripts & Archives
- Map Collection
- Marx Science & Social Science Library
- Medical Library
- Music Library
- Sterling Library
- Yale Center for British Art
