The AUB Library System consists of two main libraries: the University Libraries and Saab Memorial Medical Library.

The University Libraries include the Jafet Memorial Library as the central library with two branches: the Engineering/Architecture Library and the Science/Agriculture Library with its annex AREC (Farm) Library. The libraries have a long history in Lebanon and in the region which is very much reflected in the rich collections that they own. The University Libraries serve a population of 6500 campus users and open a total of 90 hours per week.

The Saab Memorial Medical Library (SML), dedicated to the memory of Dr. Nicholas Saab, qualifies as one of the best medical libraries in the Middle East. In 1978, SML was designated by WHO as the National Focal Point for Lebanon. SML is a hybrid library that is constantly increasing its online resources while retaining its traditional services to all AUB users as well as non-AUB users. It opens 80 hours/week.