York University Libraries evolved over a number of years since the opening of York University.
- 1963 Leslie Frost Library is dedicated
- 1965 (Fall) Steacie Science and Engineering Library opens
- 1971 (October 31) W.P. Scott Library is dedicated
- 2003 (September 2) Peter F. Bronfman Business Library opens
- 2024 (September 3) Markham Campus Library opens
Deans
On July 1, 2017, the University Librarian position became Dean of Libraries
| Joy Kirchner | 2015-2023 |
| Andrea Kosavic (interim) | 2023-2024 |
University Librarians
| Douglas G. Lochhead | 1960 -1963 |
| Thomas F. O'Connell | 1963 -1976 |
| William Newman (acting) | 1976 -1978 |
| Anne Woodsworth | 1978 -1983 |
| Ellen Hoffmann | 1983 - 2001 |
| Cynthia Archer | 2001-2014 |
"A brief account of the beginnings of the Library of York University" by Thomas F. O'Connell, April 23, 1965