- Walter O. Evans collection of Ollie Harrington artwork (JWJ MSS 236)89
- Walt Whitman collection (YCAL MSS 202)81
- Gertrude Stein and Alice B. Toklas papers (YCAL MSS 76)79
- [Parliamentary speeches, negotiations, etc., (most from 1640-1641)] (OSBORN FB161)74
- Spinelli Archive (GEN MSS 109)67
- Edmund Wilson papers (YCAL MSS 187)62
- Eugene O'Neill papers (YCAL MSS 123)61
- James Weldon Johnson and Grace Nail Johnson papers (JWJ MSS 49)60
- Claude McKay collection (JWJ MSS 27)54
- H. D. Papers (YCAL MSS 24)54
- Jean Toomer papers (JWJ MSS 1)53
- Randolph Linsly Simpson African-American Collection (JWJ MSS 54)52
- William Carlos Williams papers (YCAL MSS 116)50
- Dial/Scofield Thayer papers (YCAL MSS 34)46
- Rachel Carson papers (YCAL MSS 46)43
- Czesław Miłosz papers (GEN MSS 661)42
- Dorothy Richardson collection (GEN MSS 302)42
- Caroline Sheridan Norton collection (GEN MSS 260)41
- Franz R. and Kathryn M. Stenzel collection of western American art (WA MSS S-2368)41
- Mabel Dodge Luhan papers (YCAL MSS 196)40