- IAWA Small Collections,, 1907/201346
- IAWA: International Archive of Women in Architecture Records, 1967/2013, bulk 1985/200835
- Identification Office Records, 1992/2001, bulk 1992/20012
- Ignorance Club collection, 1908/20241
- Imogene M. King Papers, 1948/20161
- Improvisational Theatre (I.T.) records, 1986/20174
- Inge Horton Architectural Collection, 1964/199929
- Ingleside Book Club Records, 1923/20231
- Initiatives in Educational Transformation records, 1990/19991
- Institute for Advanced Public Policy Studies records, 1980/19991
- Institute for the History of Technology and Industrial Archaeology Records, 1875/2005, bulk 1980/200541
- Instructive Visiting Nurses Association records, 1902/19996
- Intercollegiate Athletics Records, 1930/2023, bulk 1975/200050
- Intercollegiate Athletics records, 192033
- Intercollegiate Debate Council Records, 1931/19972