MOBIUS Maintenance

The MOBIUS online library catalog will temporarily suspend services MOBIUS borrowing and lending services starting on April 18 as it migrates to a new operating and software system. For material requests, please use interlibrary loans via ILLiad. For further details, see the Temporary Disruption to MOBIUS Service article.

Impact Report

Students biking and walking across the Danforth Campus.

These figures and graphs capture the impact and development of the Washington University Libraries’ collections, core services, remote support, outreach efforts, and more, for FY23 (July 2022 through June 2023).

Figures include all Washington University Libraries except where otherwise indicated.

Collections | Expanding Digital Resources | Usage | Instruction & Outreach
Events & Engagement | People | Spaces | Expenditures | Ranking Results


Print books1,967,136
Print journals46,778
Other formats*429,026
Total research collections base5,256,069

*Other formats include microforms, audiovisual materials, manuscripts, architectural drawings, photographs, maps, etc.

Expanding Digital Resources

Collection materials digitized66,409
University repository (Open Scholarship) contributions2,652


Initial physical circulations (includes reserves)41,457
E-books viewed/used217,132
E-journals viewed/used3,8987,314
Repository downloads1,144,589
Inter-institutional loans (includes ILL and Mobius)21,892
Inter-institutional borrowed19,300
Total visitors*763,986

*Does not include Bernard Becker Medical Library

Instruction & Outreach

Instruction sessions (In-person and virtual)1,844
Number of participants32,505

Events & Engagement*

Public events (In-person and virtual)89
Event attendees2,177
Social media followers (primary Libraries accounts only)5,783
Website views1,874,801

*Does not include Bernard Becker Medical Library, Brown School Library, or Law Library


Total full-time staff199
New positions*2

*Does not include Bernard Becker Medical Library, Brown School Library, or Law Library

Libraries Spaces*

LocationsSquare FootageUser Seats
John M. Olin Library158,4891,383
Al and Ruth Kopolow (Business) Library10,338293
Brown School Library4,52666
East Asian Library7,954116
Gaylord Music Library7,87968
Kranzberg Art & Architecture Library8,83479
Law Library49,565534
West Campus Library56,540n/a

*Does not include Bernard Becker Medical Library

FY23 Expenditures

*Personnel includes fringe benefits

Ranking Results

Association of Research Libraries (ARL) Investment Index (FY22)*30
Princeton Review Best College Library21